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

    <schemaVersion>X0304</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2012-02-27</periodOfReport>

    <dateOfOriginalSubmission>2012-02-28</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001277350</issuerCik>
        <issuerName>BLACKROCK STRATEGIC EQUITY DIVIDEND TRUST</issuerName>
        <issuerTradingSymbol>BDT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001333739</rptOwnerCik>
            <rptOwnerName>Harris Jerrold B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>55 EAST 52ND STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10055</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2012-02-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>134</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Effective as of February 27, 2012, BlackRock Strategic Equity Dividend Trust (the &quot;Target Fund&quot;) was reorganized into BlackRock Enhanced Equity Dividend Trust (the &quot;Acquiring Fund,&quot; and such reorganization, the &quot;Reorganization&quot;). In the Reorganization, common shareholders of the Target Fund received common shares of beneficial interest of the Acquiring Fund in an amount equal to the aggregate net asset value of the Target Fund's common shares as determined at the close of business on February 24, 2012, less the costs of the Reorganization (although cash was distributed for any fractional shares).  As of February 24, 2012, the Target Fund reported a net asset value per share of $11.9347 and the Acquiring Fund reported a net asset value per share of $8.4561. The conversion ratio for the Target Fund's common shares was 1.41137167. In the Reorganization, Mr. Jerrold B. Harris received 189 common shares of the Acquiring Fund in exchange for his 134 common shares of the Target Fund.</footnote>
        <footnote id="F2">This amendment to the Form 4 filed February 28, 2012 amends Column 4 in Table I to reflect the correct number of common shares disposed of by the reporting person following the reported transaction.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Noah Gellner as Attorney-in-Fact</signatureName>
        <signatureDate>2012-03-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
