With the promotion of the single set system, paper archives are gradually being replaced by electronic documents, and the evidence status of electronic documents is far less than that of paper archives, so the decentralized trend of archive evidence system cannot be contained by subrogation. The cross domain mixing of combined concepts, the separation of declarative norms and the intra domain advice on the front are the main manifestations of the current electronic document evidence use program. If we regard the legal effect as the same as the evidence status, subjectively connect the "four characteristics" requirements of electronic documents with the "four characteristics" standards of evidence, or forcibly reduce the boundary between vouchers and evidence, we cannot successfully realize the adaptation of electronic documents to the elements of the evidence system. Therefore, it is necessary to disenchant the special cognition of electronic documents and the technology of "evidential improvement", and at the same time, take the field law as the unified implementation standard to continue to make efforts to complete the central transfer from the front end to the back end, and return from the paper files to the center of judicial certification, so as to finally realize the "re centralization" of the evidence use program of electronic documents.