Abstract Aiming at the problems of insufficient redundancy, low retrieval efficiency, and poor access mobility in the current centralized storage method of traditional seismic data system,a blockchain-based seismic data mechanism based on the DBFC is designed. Data security access control mechanism for blockchain solutions has been proposed, and the access control process and methods for data security in the seismic industry have been explained to ensure the uniqueness, reliability, and integrity of data area access control permissions. The DBFC-BD data security access control method based on smart contracts is designed to implement an open efficient, and fully transparent access mechanism for big data resources. Practical simulations have shown that this mechanism is stable and reliable, and can effectively contribute to the data security capabilities in the seismic system.