<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-07-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000710846</issuerCik>
        <issuerName>FUSHI INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>FSIN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001378534</rptOwnerCik>
            <rptOwnerName>BAI FENG</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1001 TUNG CHAI BUILDING</rptOwnerStreet1>
            <rptOwnerStreet2>86 WELLINGTON STREET</rptOwnerStreet2>
            <rptOwnerCity>CENTRAL</rptOwnerCity>
            <rptOwnerState>K3</rptOwnerState>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>HONG KONG</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>11.75</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-07-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-07-04</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-07-04</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <remarks>On July 4, 2007, the Reporting Person was granted an option to purchase 50,000 shares of common stock of Fushi International, Inc. (&quot;Fushi&quot;).  The stock options shall vest as follows (i) 12,500 on the date of the Reporting Person's appointment as director of Fushi, (ii) 4,687 at the end of each calendar quarter after his said appointment and (iii) 4,691 at the end of the eighth calendar quarter after his said appointment.</remarks>

    <ownerSignature>
        <signatureName>/s/ Feng Bai</signatureName>
        <signatureDate>2007-07-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
