In some aircraft landing gear structural fatigue tests, cyclic load fatigue test is needed under different stress distribution state. In order to load precisely, reduce cost, reduce the waste of resources, servo loading method is adopted. Namely using displacement positioning control for loading device, indirect loading to test pieces is realized by changing the loading equipment location, to finish loading test of different state. In the past displacement control, hydraulic servo control loading equipment is used, generally control signals are susceptible to interference, positioning inaccurate and loader jitter etc are existed, resulting in positioning displacement error and poor test loading precision. In order to solve this problem, the electric control system was introduced. The system had quick response speed, high precision, no hydraulic oil intermediate medium, stable performance and high synchronicity of more actuators. Through theoretical analysis and research, and through verification test, using hydraulic drive and electrical drive interaction control technology could complete the test load control, improve the test precision, meet the demand of the gear fatigue test.The test results show that the technology can be applied to some special aircraft landing gear structure fatigue strength test.