To address issues in data disaster recovery backup solutions such as low data security， susceptibility to data loss and damage， and excessive reliance on third-party services， a blockchain-based data disaster recovery backup scheme for cloud-edge collaborative grid status monitoring was proposed. Firstly， a cloud-edge collaboration approach was adopted to enhance the efficiency of monitoring data backup. Secondly， the Paillier algorithm and threshold secret sharing were combined to encrypt monitoring data， achieving distributed backup. Finally， an improved Hot-Stuff consensus mechanism was applied to blockchain to optimize its consensus efficiency. Security analysis results demonstrate that the proposed scheme ensures privacy， integrity， unforgeability， and correctness； performance analysis results show that the scheme reduces backup and recovery latency， shortens backup and recovery time， lowers computational overhead， and increases throughput.