Abstract:This paper's point is the introduce of servo gas source. This paper put forwards the design method of servo gas source's ignition test and long-term transmissions interference suppression .The method is in connection with the requirement of servo gas source's ignition test, the principle of setting ignition process and also testing principium of servo assembly control system. This paper analyzes the cause of interference and suppression method during servo gas source's ignition test. Furthermore, this paper achieves high reliable method of circuit by means of a reasonable choice of ignition power. At last , application in the ignition tests proves the ignition circuit is designed to meet the requirements of the test.