A computer-implemented method for blockchain network configuration modification, includes obtaining, by a management client device, modification operation information, where the management client device is a blockchain client device of a blockchain network on which an administrator account is logged in as a logged-in administrator account, and where a user account of the blockchain network comprises at least one administrator account. The management client device constructs a configuration modification transaction including the modification operation information. The configuration modification transaction is signed using the logged-in administrator account. The signed configuration modification transaction is submitted to the blockchain network. After performing signature verification on the configuration modification transaction, each node in the blockchain network modifies, based on the modification operation information comprised in the configuration modification transaction, blockchain network configuration information stored in the node and the configuration modification transaction is written into the blockchain network.