-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 M4wEgVoHb9DyRTq6wqxLhUrOuvpqR3mMQmwQNnCDuLe/d/7tvxlkmGe30o3ficIK
 Il/YAEvuBzLdUfjYCMGnAA==

<SEC-DOCUMENT>0000918751-09-000003.txt : 20090112
<SEC-HEADER>0000918751-09-000003.hdr.sgml : 20090112
<ACCEPTANCE-DATETIME>20090112144153
ACCESSION NUMBER:		0000918751-09-000003
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20090112
DATE AS OF CHANGE:		20090112
EFFECTIVENESS DATE:		20090112

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TCW STRATEGIC MORTGAGE BACKED SECURITIES L P
		CENTRAL INDEX KEY:			0000918751
		IRS NUMBER:				954460778
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-91875-1L
		FILM NUMBER:		09521437

	BUSINESS ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA STREET  SUITE 1800
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017
		BUSINESS PHONE:		213-244-0000

	MAIL ADDRESS:	
		STREET 1:		865 SOUTH FIGUEROA STREET
		STREET 2:		SUITE 1800
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90017
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0201</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000918751</cik>
        <entityName>TCW STRATEGIC MORTGAGE BACKED SECURITIES L P</entityName>
        <issuerAddress>
            <street1>865 SOUTH FIGUEROA STREET</street1>
            <street2>SUITE 1800</street2>
            <city>LOS ANGELES</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>90017</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>213-244-0000</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>CA</jurisdictionOfInc>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>TCW ASSET</firstName>
                <middleName></middleName>
                <lastName>MANAGEMENT COMPANY</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>THIS IS THE GENERAL PARTNER OF TCW STRATEGIC MORTGAGE BACKED SECURITIES LIMITED PARTNERSHIP, NOT A DIRECTOR.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>PHILLIP</firstName>
                <middleName>A</middleName>
                <lastName>BARACH</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>ROBERT</firstName>
                <middleName>D</middleName>
                <lastName>BEYER</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>MICHAEL</firstName>
                <middleName>E</middleName>
                <lastName>CAHILL</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>JOEL</firstName>
                <middleName>A</middleName>
                <lastName>DAMIANI</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>JOSEPH</firstName>
                <middleName>J</middleName>
                <lastName>GALLIGAN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>JEFFREY</firstName>
                <middleName>E</middleName>
                <lastName>GUNDLACH</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>DAVID</firstName>
                <middleName></middleName>
                <lastName>DEVITO</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>865 SOUTH FIGUEROA STREET</street1>
                <street2>SUITE 1800</street2>
                <city>LOS ANGELES</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90017</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Other Investment Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>9999999997-06-039320</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1994-02-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>LIMITED PARTNERSHIP INTEREST</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>N/A</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>N/A</street1>
                    <street2>N/A</street2>
                    <city>N/A</city>
                    <stateOrCountry>CA</stateOrCountry>
                    <zipCode>90017</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>132213886</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>49</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>N/A</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>N/A</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>TCW STRATEGIC MORTGAGE BACKED SECURITIES L P</issuerName>
                <signatureName>LAZARUS N. SUN</signatureName>
                <nameOfSigner>LAZARUS N SUN</nameOfSigner>
                <signatureTitle>SVP OF TCW ASSET MANAGEMENTCOMPANY, ITS GENERAL PARTNER</signatureTitle>
                <signatureDate>2009-01-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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