Abstract: To study the fatigue mechanical properties of reduced scale and full-scale components with different materials and different structural forms, the mechanical structure, basic functions, technical performance, controller and control software of the 500 kN electro-hydraulic servo pulsating fatigue test loading system were introduced, and the application of the loading system was fully explained. The static load test and dynamic test of the components were carried out by using the dual-purpose electro-hydraulic servo pulsating fatigue test loading system, and typical static load test and fatigue test using electro-hydraulic servo pulsating fatigue test loading system were introduced. It is shown that the electro hydraulic servo pulsation fatigue loading system meets the requirements of static load test and dynamic load test.