Aiming at the problems of poor data storage security and high load pressure on data transmission server,a massive industrial big data parallel transmission and capacity expansion storage system is designed.The parallel transmission subsystem cooperates with each other through user interface module,wireless communication module and USB module,adopts FPGA parallel transmission technology,and carries out parallel high-speed transmission in the form of P2P after character coding based on Cyclone V series core processor.The capacity expansion storage subsystem removes the duplicate data collected by the interface by integrating dedup and map/reduce technology,and uses the big data security fault-tolerant algorithm to control the convergence and elasticity of data to realize the capacity expansion storage of big data.The experiment results show that the big data storage integrity of the system is high.It can realize stable parallel transmission of big data.The security of data storage is high, and the real-time load pressure of the server does not exceed 20% when large data is transmitted in parallel.