According to the Procurator’s Daily News, Chen Pingxiang, the chief procurator of the People’s Procuratorate of Xihu District, Hangzhou, Zhejiang Province, pointed out that the blockchain technology is just like DNA technology. The future will provide great support for judicial proof, but it cannot be too “myth”. Careful and rigorous rules of evidence should be set. When reviewing the electronic data extracted by the application of blockchain technology, we still need to pay attention to the following two aspects: First, the originality of the electronic data before the uplink. Before the data is attached to the blockchain, the authenticity and integrity of the data in this time period cannot be proved by the blockchain itself. It is still necessary to combine the evidence of forensics, the transcript of the inquest, the audio and video recordings of the forensics process, and comprehensive analysis. Determine whether the electronic data is tampering or contaminated before being wound up. The second is the legality of the collection and extraction process. The electronic data extracted by the blockchain technology does not of course have the legality of the procedure. It is still necessary to examine whether the elements of the evidence collection subject, the evidence collection procedure, the location of the evidence are legal, etc. according to the requirements of the Criminal Procedure Law, and prevent the illegal evidence from becoming the basis for the final decision.