Aiming at the high reliability requirements of the working environment of the integrated permanent magnet servo motor on its internal drive control system, this article studies the reliability of the integrated permanent magnet servo motor control system. First, complete the system hardware design, and then use component stress analysis The reliability expected method and stress data obtain the disordered data of each electronic component during the design phase, convert it into a faulty tree model of the failure of the failure and build the fault tree model of the integrated motor control control system, and conduct qualitative analysis and quantitative on this basis Analysis, and based on the results of reliability analysis, put forward some measures to improve the reliability of the integrated driving control system.