Abstract: In order to explore the plugging force and reliability of fish-eye-hole compliant pins in the process of plugging, this paper first verified the structure size of a fish-eye-hole compliant pin. Through the simulation calculation based on ANSYS Workbench software and comparison with the measured values, it is concluded that the plugging force and material stress meet the design requirements. Finally, by changing the round corners of the fish-eye-hole compliant pin, the simulation of the plugging force and contact state during the plugging process was carried out, and the experimental verification was carried out. As a result, the influence of round corners on the plugging force and reliability during the plugging process was obtained. The reason is that the size of the round corners of the fish-eye-hole compliant pin affects the contact area when it was plugged into PCB holes. This paper provides theoretical support for the design of fish-eye-hole compliant pins.