<SUBMISSION>
<ACCESSION-NUMBER>0001261965-03-000002
<TYPE>4/A
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20030916
<FILING-DATE>20030916
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>SIDHU JEET
<CIK>0001261965
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4/A
<ACT>34
<FILE-NUMBER>000-29819
<FILM-NUMBER>03897014
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>UNIT 216-1628 WEST 1ST AVENUE
<CITY>VANCOUVER BC
<STATE>A1
<ZIP>V6J 1G1
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>HEPALIFE TECHNOLOGIES INC
<CIK>0001054274
<ASSIGNED-SIC>9995
<IRS-NUMBER>582349413
<STATE-OF-INCORPORATION>FL
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>1628 WEST 1ST AVENUE
<STREET2>UNIT 216
<CITY>VANCOUVER
<STATE>A1
<ZIP>V6J 1G1
<PHONE>800-518-4879
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1628 WEST 1ST AVE
<STREET2>UNIT 216
<CITY>VANCOUVER
<STATE>A1
<ZIP>V6J 1G1
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ZETA CORP
<DATE-CHANGED>20030219
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ZETA CORP /CA
<DATE-CHANGED>20000303
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2003-09-16</periodOfReport>

    <dateOfOriginalSubmission>2003-02-10</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001054274</issuerCik>
        <issuerName>HEPALIFE TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>HPLF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001261965</rptOwnerCik>
            <rptOwnerName>SIDHU JEET</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>UNIT 216-1628 WEST 1ST AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>VANCOUVER BC</rptOwnerCity>
            <rptOwnerState>A1</rptOwnerState>
            <rptOwnerZipCode>V6J 1G1</rptOwnerZipCode>
            <rptOwnerStateDescription>BRITISH COLUMBIA, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>

        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.07</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2003-02-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>750000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-02-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>750000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>750000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>

    </derivativeTable>

    <footnotes>
        <footnote id="F1">The stock options become exercisable in three (3) equal installments of thirty-three and one-third percent (33 1/3%), the first installment to be exercisable February 10, 2003, with an additional thirty-three and one-third (33 1/3%) of the shares becoming exercisable on each of the two (2) successive anniversary dates.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Jeet Sidhu</signatureName>
        <signatureDate>2003-09-16</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
