Aiming at the problem that it is difficult to quantify and predict the effectiveness evaluation of the maintenance and support system of space measurement radar, an effectiveness evaluation model of the maintenance and support system based on system dynamics is designed. The basic steps of system dynamics modeling and evaluation are described, and the causality diagram and inventory flow diagram models for effectiveness evaluation of aerospace instrumentation radar maintenance support system are given, and the function equations for the main variables are described. The example verification is realized by Anylogic simulation software. The results show that the system dynamics model evaluation is feasible and effective, which can provide support for the continuous improvement of the maintenance support system of space measurement radar.