Three-point locking device

The utility model belongs to the technical field of locking structures. In view of the problem that a compartment door of an existing garbage transfer truck is poor in sealing performance, the utility model discloses a three-point locking device which comprises a first main body, a second main body, a third main body and a fourth main body, the first locking piece is positioned on one side of the first guide seat; one end of the driven shaft penetrates through the first guide seat and the first lock piece to form a lock shaft structure; the two connecting pieces are pivoted to the two sides of the driven shaft; the second main body is provided with a second guide seat and a second locking piece; the second guide seats are positioned on two axial sides of the driven shaft; the second locking piece is located on the side, away from the driven shaft, of the second guide base. The two driving shafts are arranged on the two sides of the axial direction of the driven shaft; one end of the driving shaft penetrates t