Autonomous supervisible block chain data fragment storage method capable of guaranteeing privacy

The invention discloses an autonomously supervisible block chain data fragment storage method capable of guaranteeing privacy. The method comprises the following steps: S1, configuring block chain nodes; s2, a user selects a file needing to be uploaded; s3, the client records an ID and a hash value; s4, uploading the ID and the hash value to a verification block chain for evidence storage; s5, storing the file data into a database; s6, acquiring an IP address of the storage node; s7, uploading the IP address of the fragment node of the storage file and other file data to the storage chain; s8, the storage chain synchronization service analyzes the data; s9, fragmenting the file by the client; s10, carrying out encryption on each fragment; s11, the client stores the encrypted file fragments; s12, all file fragments are stored in a supervision server; s13, the user selects to download the file at the client; s14, downloading the file fragments; s15, the fragments are decrypted; s16, integrating the file fragmen