Anti-overload electronic pressure relief valve used for undercarriage buffer

The invention relates to an electronic pressure relief valve, in particular to an anti-overload electronic pressure relief valve used for an undercarriage buffer. The anti-overload electronic pressurerelief valve used for the undercarriage buffer comprises a cavity I and a cavity II communicating with the cavity I. A power supply, a motor and a controller are mounted on an upper cover of the cavity I. The controller is connected with the motor and is used for controlling an ejection rod of the motor to stretch or retreat. An exhaust port is formed in the upper cover. An elastic piece, an exhaust plug and a pressure sensor are arranged in the cavity II. One end of the elastic piece is fixed to a lower cover of the cavity II, and the other end of the elastic piece is connected with the bottom of the exhaust plug. The top of the exhaust plug abut against the ejection rod, and the exhaust plug is used for blocking an air vent enabling the cavity I to communicate with the cavity II. The pressure sensor is connecte