Government data protocol authorization sharing method and device based on block chain

The invention belongs to the technical field of blockchain application, and provides a government data protocol authorization sharing method and device based on a blockchain. The method comprises the following steps: after an owner signs a government data authorization agreement and links the agreement, receiving a government data request sent by a user, and organizing related government numbers to form data pieces; encrypting and chaining the data piece through multiple parties, signing and issuing the data piece to a blockchain account of an owning party, and sending a signing and issuing message to a user, thereby enabling the user to obtain the encrypted data piece according to an access address in the signing and issuing message, decrypting the data to obtain a data original text, and pushing a data sharing completion notification to the owning party and an issuer at the same time; and receiving a data sharing completion notification pushed by the user, wherein the data protocol authorizes the completion