Abstract: A series of safety-classified qualification tests are carried out on nuclear safety level K2,K3 class solenoid valve and limit switch developed by domestic manufacturers.Test condition and test requirements for anti-seismic experiments on the equipment to be qualified are introduced,and the universal device spectrum is selected for the anti-earthquake test based on the actual situation of the equipment to be qualified.In order to ensure the safety and reliability of the equipment operation during the earthquake,the load circuit of solenoid valve and the contact bounce monitoring devices of limit switch are developed,and operation test is conducted on the solenoid valve and the switch contacts chatter during the seismic tests is monitored.Test conditions and results fully meet the requirements.