Abstract
This paper describes an innovative design by using blockchain to improve the verification and security of data in industrial control systems. Combining the decentralized-blockchain, the Programmable Logic Controller, and Human Machine Interface. The design strengthens the overall data security. With the immutable recording function of blockchain, PLC can manage data interactions and conduct real-time monitoring. After testing and simulation, the practicability and effect of this innovative design were proved, and shows the potential of this work.