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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 3RK7qD+y+RJ2JUKOz/eJAw==

<SEC-DOCUMENT>0000899681-08-000527.txt : 20080509
<SEC-HEADER>0000899681-08-000527.hdr.sgml : 20080509
<ACCEPTANCE-DATETIME>20080509170832
ACCESSION NUMBER:		0000899681-08-000527
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080502
FILED AS OF DATE:		20080509
DATE AS OF CHANGE:		20080509

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UBS MULTI-STRAT FUND LLC
		CENTRAL INDEX KEY:			0001279038
		IRS NUMBER:				201139036

	BUSINESS ADDRESS:	
		STREET 1:		UBS FUND ADVISORS LLC
		STREET 2:		1285 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2128065400

	MAIL ADDRESS:	
		STREET 1:		UBS FUND ADVISORS LLC
		STREET 2:		1285 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UBS M3 FUND LLC
		DATE OF NAME CHANGE:	20040206

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Breen Virginia G
		CENTRAL INDEX KEY:			0001234117

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21516
		FILM NUMBER:		08819549

	BUSINESS ADDRESS:	
		STREET 1:		BLUE ROCK CAPITAL
		STREET 2:		230 LACKAWANNA DRIVE
		CITY:			ANDOVER
		STATE:			NJ
		ZIP:			07821
		BUSINESS PHONE:		781-663-5001

	MAIL ADDRESS:	
		STREET 1:		C/O CMGI. INC.
		STREET 2:		1100 WINTER STREET
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

	FORMER NAME:	
		FORMER CONFORMED NAME:	BONKER VIRGINIA G
		DATE OF NAME CHANGE:	20030520
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2008-05-02</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001279038</issuerCik>
        <issuerName>UBS MULTI-STRAT FUND LLC</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001234117</rptOwnerCik>
            <rptOwnerName>Breen Virginia G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UBS FINANCIAL SERVICES INC.</rptOwnerStreet1>
            <rptOwnerStreet2>51 WEST 52ND STREET</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK,</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>No securities are beneficially owned</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Virginia G. Breen                                                                                                                                                    Virginia G. Breen</signatureName>
        <signatureDate>2008-05-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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