In order to reduce and evaluate the safety hazards of key components of mechanical parking system,DH5972N is used to build the long-term online monitoring system by determining the measuring points,pasting strain gauges and connecting.The monitoring system eliminates the influence of adverse factors such as electromagnetic interference and humidity,and improves the stability and measurement accuracy of the monitoring system through strict process procedures.The scientific test plan is formulated to collect the real stress state of the metal structure during the operation of the mechanical parking system.The data is prepared for verifying the correctness and rationality of the design of the mechanical parking system and evaluating the safety and life of the mechanical parking system.