Block chain-based pre-loan diliary investigation data management system and method

The invention discloses a pre-loan diligence survey data management system and method based on a block chain, and belongs to the technical field of advertisement data processing. A three-layer system of a project layer, a sharing layer and an auditing layer is established based on a block chain, the project layer opens financial projects and manages and analyzes project data templates, the auditing layer establishes a financial data auditing network based on a block chain network, the sharing layer is a public chain, and the sharing layer stores financial project sharing information and verification ciphertexts; the financial project auditing method guarantees that the financial project auditing process is open and transparent, the basic survey data are screened out, repeated survey of the basic survey data with high stability is avoided, the period of applying for the financial project by a user is shortened, the resource utilization rate is greatly improved, meanwhile, the application situation of the finan