Alliance chain slimming method and system based on smart contract

The invention relates to the technical field of block chain account book data storage, in particular to an alliance chain slimming method and system based on a smart contract, and the method comprises the steps: recording an alliance chain block account book according to a preset data structure; performing uplink processing on the user identity public key certificate information by adopting an intelligent contract technology to obtain a corresponding identity public key certificate unique index; the identity public key certificate unique index refers to the user identity public key certificate information for communication; acquiring corresponding user identity public key certificate information by adopting the identity public key certificate unique index, and performing signature verification through the user identity public key certificate information; and referring the identity public key certificate information of the user by adopting the unique index of the identity public key certificate, and generating