According to the need of the development of new generation switch cabinet

based on the current situation and the existing problems of earthing switch

the plug-in earth switch having self-elastic contact is designed preliminarily. Through the theory calculation and simulation analysis

the design of self-elastic contact is checked

and the prototype for testing the performance of the contact is made. Experimental result shows that the design of the contact can meet the requirements of the mechanical endurance and the short-time withstand current test. The rationality of the design method of the self-elastic contact is verified.