As　a　distributed　ledger,　blockchain　solves　the　decentralized　trust　problem　by　integrating　a　series　of　techniques　such　as　distributed　consensus,　P2P　(Peer　to　Peer)　network,　smart　contracts,　and　cryptography.　Blockchain　has　a　meaningful　impact　on　the　society　and　lifts　a　bloom　of　researches　and　applications　due　to　the　characteristics　of　immutability　and　decentralization.　Blockchain　technology　has　a　broad　scope　of　applications,　and　its　unique　advantages　can　deal　with　the　pain　points　in　many　industry　scenarios.　However,　the　blockchain　technology　is　faced　with　the　problem　of　data　privacy　leakage　in　its　applications,　such　as　the　disclosure　of　transaction,　account　and　personal　information　privacy,　which　greatly　impose　restrictions　on　the　application　scope　and　fields.　Data　privacy-preserving　for　blockchain　has　become　one　of　the　key　problems　concerned　by　researchers.　In　this　survey,　we　first　describe　the　evolutionary　history　of　blockchain　technology,　define　the　concept　of　corresponding　privacy　according　to　applications　in　the　field　of　blockchain　and　introduce　the　main　technical　points　and　the　technology　architecture　of　blockchain.　Then　we　summarize　the　privacy-preserving　problems　faced　by　the　blockchain　technology　and　explore　the　existing　solutions　based　on　the　proposed　concept　of　data　privacy　protection.　Finally,　some　problems　that　still　need　to　be　addressed　and　future　research　directions　of　data　privacy-preserving　for　blockchain　are　discussed　based　on　the　analysis.　©　2021,　Science　Press.　All　right　reserved.