The application discloses a passwordprocessing method and device based on a blockchain and a medium. The passwordprocessing method and device based on the blockchain utilize a blockchain super account book technology to perform segmented processing on user passwordplaintext when the user password plaintext is saved, and the user password plaintext is saved by multiple password administrators. When a user forgets a password, the password can be restored only by permission of the multiple password administrators. In addition, each time a password is input or restored, super account book verification and recording are performed, and the security of password management is significantly improved.