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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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<SEC-DOCUMENT>0000850660-08-000001.txt : 20080508
<SEC-HEADER>0000850660-08-000001.hdr.sgml : 20080508
<ACCEPTANCE-DATETIME>20080508105629
ACCESSION NUMBER:		0000850660-08-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080506
FILED AS OF DATE:		20080508
DATE AS OF CHANGE:		20080508

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MELNUK PAUL D
		CENTRAL INDEX KEY:			0001253514

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13023
		FILM NUMBER:		08812458

	MAIL ADDRESS:	
		STREET 1:		6 COUNTRYSIDE LANE
		CITY:			ST LOUIS
		STATE:			MO
		ZIP:			63131

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THERMADYNE HOLDINGS CORP /DE
		CENTRAL INDEX KEY:			0000850660
		STANDARD INDUSTRIAL CLASSIFICATION:	MACHINE TOOLS, METAL CUTTING TYPES [3541]
		IRS NUMBER:				742482571
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		16052 SWINGLEY RIDGE RD.
		STREET 2:		SUITE 300
		CITY:			CHESTERFIELD
		STATE:			MO
		ZIP:			63017
		BUSINESS PHONE:		636 728 3032

	MAIL ADDRESS:	
		STREET 1:		16052 SWINGLEY RIDGE RD.
		STREET 2:		SUITE 300
		CITY:			CHESTERFIELD
		STATE:			MO
		ZIP:			63017

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TD II
		DATE OF NAME CHANGE:	19940131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TD II /DE/
		DATE OF NAME CHANGE:	19940131
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-05-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000850660</issuerCik>
        <issuerName>THERMADYNE HOLDINGS CORP /DE</issuerName>
        <issuerTradingSymbol>THMD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001253514</rptOwnerCik>
            <rptOwnerName>MELNUK PAUL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6 COUNTRYSIDE LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST LOUIS</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63131</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>restricted shares</value>
            </securityTitle>
            <transactionDate>
                <value>2008-05-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25775</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>241029</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>stock option right to buy</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>14.88</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-05-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8326</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.88</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-05-06</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8326</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>283326</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Also reported on this filing are an additional 2,516 shares acquired through the Company's Employee Stock Purchase Plan</footnote>
        <footnote id="F2">100% of the grant will vest if the Company hits the target of 35% average ROIOC over the three-year vesting period, (12/2008, 12/2009, 12/2010), 67% of the grant for 30% average ROIOC, and 33% of the grant for 25% average ROIOC.  Results in between these amounts will produce vesting on the basis of interlinear interpolation.  If the Company fails to hit the threshold of 25% average ROIOC, the grant will be forfeited.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Mark A. McColl</signatureName>
        <signatureDate>2008-05-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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