Data　dominates　in　finance,　which　is　significant.　The　financial　industry　needs　a　cross-institutional　data　circulation　mechanism　to　promote　development,　but　data　sharing　faces　challenges　such　as　low　credibility,　low　sharing　efficiency,　and　privacy　security　issues,　and　there　are　still　data　islands　and　security　sharing　problems.　Combining　the　characteristics　of　blockchain　and　privacy　computing　technology,　this　paper　designs　a　secure　and　efficient　multi-party　computing　model　based　on　blockchain　to　find　the　balance　between　privacy　and　practicality　of　financial　data　and　solve　the　tense　situation　in　the　financial　industry　to　the　greatest　extent.　Considering　the　limitations　of　blockchain　storage　and　computing　power,　the　solution　in　this　paper　is　to　introduce　IPFS　to　combine　on-chain　storage　data　with　on-chain　indexing　as　a　storage　environment,　and　to　introduce　cloud　networks　as　computing　centers.　©　2023　IEEE.