<SUBMISSION>
<ACCESSION-NUMBER>0001062359-03-000001
<TYPE>4/A
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20030916
<FILING-DATE>20030916
<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>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>RAYAT HARMEL S
<CIK>0001062359
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4/A
<ACT>34
<FILE-NUMBER>000-29819
<FILM-NUMBER>03897177
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>1515 WEST 22ND STREET
<STREET2>SUITE 1210
<CITY>OAK BROOK
<STATE>IL
<ZIP>60521
<PHONE>6046595006
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>216 1628 WEST FIRST AVENUE
<STREET2>V6J 1G1
<CITY>VANCOUVER BC
<STATE>A1
</MAIL-ADDRESS>
</REPORTING-OWNER>
<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>0001062359</rptOwnerCik>
            <rptOwnerName>RAYAT HARMEL S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>216 1628 WEST FIRST AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>V6J 1G1</rptOwnerStreet2>
            <rptOwnerCity>VANCOUVER BC</rptOwnerCity>
            <rptOwnerState>A1</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>BRITISH COLUMBIA, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeHolding>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>43403332</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>

        <nonDerivativeHolding>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1900000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Owned by spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>

    </nonDerivativeTable>

    <derivativeTable>

        <derivativeHolding>
            <securityTitle>
                <value>Share Purchase Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.025</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2005-03-22</value>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1900000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1900000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Owned by spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>

        <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>5500000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-02-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5500000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5500000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>

    </derivativeTable>

    <footnotes>
        <footnote id="F1">On February 7, 2003, the Board of Directors of the Company agreed to extend the expiration date of 12,000,000 share purchase warrants, 1,900,000 of which are held by Mr. Rayat's wife and 8,100,000 are held by other family members, from March 22, 2003, to March 22, 2005.  Mr. Rayat disclaims beneficial ownership of all shares and share purchase warrants beneficially owned by his wife and all shares and share purchase warrants beneficially owned by other family members.</footnote>
        <footnote id="F2">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 percent (33 1/3%) of the shares becoming exercisable on each of the two (2) successive anniversary dates.</footnote>
        <footnote id="F3">Can be exercised immediately.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Harmel S. Rayat</signatureName>
        <signatureDate>2003-09-16</signatureDate>
    </ownerSignature>

</ownershipDocument>

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