One type of guidance rocket system is a newly invented weapen system assembled on the main aircraft type of army aviation. In order to ensure the high-efficiency and high-precison completion of manual inspection before boarding the aircraft, a new measurement circuit was designed in this paper.The constant current and voltage source circuit achieved the detection of the resistance unit in the ignition circuit of the guided rocket and the detection of resistance unit of the signal line to the ground.Paper also designed the hardware circuit that combines with the software to synchronous sapmle the AD value to eliminate the interference caused by the discrete type of electronic devices,which makes the resistance unit in ignition path tset is not affected by the environment show that method can efficiently complete the test and the measurement accuracy has reached the expected goal.