Electronic medical record information tamper-proofing method and system based on blockchain

The invention discloses an electronic medical record information tamper-proofing method and system based on blockchain. The method comprises the following steps: establishing a blockchain distributed network formed by mutually linking nodes; enabling the node receiving the packaging information to continuously broadcast to other nodes, and automatically packaging and synchronizing the electronic medical record information body and the electronic medical record hash value to the nodes of each distributed network through point-to-point transmission; comparing a new hash value obtained by performing hash operation on the detected tampered electronic medical record information with an original carried hash value, and considering that the electronic medical record information is tampered if the new hash value is inconsistent with the original carried hash value. The electronic medical record information is subjected to Hash operation in a Hash encryption mode to obtain the Hash value of the electronic medical reco