According to the material aging failure mechanism in the deep sea environment, quantitative technical indicators of deepsea environment aging simulator were produced, and the overall system design scheme was decided.Mechanical structure design and control system based on PID control algorithm design of deepsea environment aging simulator were expounded in detai. Realtime monitoring and data collection of PLC control process were implemented through MCGS embedded system, which presented main interface and debugging process of deepsea environment aging simulator. The results show that the system is highly automatic, and can simulate different conditions of deep sea environment in the laboratory, which can realize evaluation of the material deepsea immersion, corrosion and aging failure.