Abstract: In this paper, the finite element analysis model of a certain type of vehicle program actuator is established by using ANSYS Workbench, and its modal analysis is carried out. On this basis, random vibration and shock response analysis is carried out, and the deformation and stress distributions of the structural parts and the layered PCBA are obtained. The results show that the structure design of the program executor box can satisfy the application requirements of the whole equipment. The maximum displacement response on the PCBA mainly occurs far from the installation hole. But stress concentration is prone to occur at the location of installation hole. Locally adding pillars among the large-mass important components of the PCB board can effectively improve the stiffness of the PCB board, and the failure in follow-up experiments can be avoided to some extent.