As an important component in electronic equipment, the reliability of electrical connectors determines the life of the entire electronic equipment. Vibration is one of the main factors affecting the reliability of electrical connectors, and the contact pressure of connectors is an important indicator of the reliability of connectors. In this paper, ANSYS simulation is used to study the contact pressure of electrical connectors under static and different vibration conditions. The research results show that the contact pressure becomes smaller under the vibration condition than under the static condition. The increase of the vibration amplitude has little effect on the contact pressure; the increase of the vibration frequency has a great influence on the contact pressure. With the increase of the vibration frequency, the minimum value of the contact pressure decreases.