The utility model discloses an earthing wire earthing connection device. The device comprises a base. A busbar is arranged on one end of the base. Wire pressing holes are arranged on the busbar. An electric contact surface and a supporting wall are arranged on the other end of the base. The supporting wall is hinged with one end of a pressure rod through a rotating shaft. The middle part of the pressure rod is vertically connected with a movable shaft. Through holes which are axially vertical to the movable shaft are arranged on both ends of the movable shaft. The through holes are connected with a U-shaped hook. Two feet of the U-shaped hook pass through the through holes and are sheathed with springs. Spring limit devices are arranged on the tail ends of two feet of the U-shaped hook. According to the utility model, when the earthing wire earthing connection device is used, an earthing pole is located between the U-shaped hook and the electric contact surface; by rotating the pressure rod, the U-shaped hook and the electric contact surface clip the earthing pole; and after the pressure rod passes through a dead point of a connection rod mechanism, self-locking of the connection device is realized, and the earthing connection operation of an earthing wire is completed.