The invention discloses an automatic test method for the trail speed of an electronic countermeasure device, which belongs to the technical field of testing. The invention provides the automatic testmethod for the trail speed parameters of the electronic countermeasure device. The work intensity of a tester is effectively reduced. The work skill requirement of the tester is reduced, and the testcost is reduced. Operation and observation uncertainties in a manual test link are reduced. A computer is used to acquire data and operational data at high speed. Accurate trail length and trail timecan be acquired. The test accuracy of a calculated test result is high. A software algorithm is used to characterize the complete movement trace of a trail in a single work cycle. Observation data areintuitive and accurate.