Block chain privacy data protection method and device, equipment and storage medium

The invention relates to the technical field of block chain privacy data protection, in particular to a block chain privacy data protection method. The method comprises the following steps: acquiring target privacy data information of a first target user, thereby acquiring a privacy encryption key set; performing analysis and timing decryption setting on a plurality of data blocks cut from the target privacy data information, and outputting a data timing decryption setting result; obtaining a data double encryption result; acquiring a data information acquisition request of a second target user, performing decryption judgment on encrypted data in the data dual encryption result, and outputting a data decryption ending or data dual decryption success result; automatically selecting a first data block to be decrypted from the data timing decryption setting result; and performing decryption to obtain a first private data block acquisition result, a second private data block acquisition result and a residual priv