Abstract: Aiming at the clearance sensor measurement requirements used in the separating plane of the certain rocket, a new dynamic test method of the clearance sensor is proposed and the measurement system is designed. Through the laser testing method, the output response of the clearance sensor CI1-27 is tested and memorized. The actual application shows that the new method has convenient operation and high reliability, it can also has the reference significance for the dynamic test method of the clearance sensor.

Key words: Clearance sensor, Dynamic test, The means of laser test