The invention discloses an electronic locking device. The electronic locking device comprises a shell. The shell is divided into an upper shell and a lower shell. The electronic locking device furthercomprises a motor, a gear set, a lock rod and a microswitch. The motor is arranged inside the shell, and the gear set is connected with a bearing of the motor. The upper end of the lock rod extends out of the shell, and the lower end of the lock rod is connected with the motor. An oscillating rod is further arranged on one gear in the gear set and can push the lock rod to rotate or lock the lockrod. The motor is connected with two power lines, the microswitch is connected with two power lines, the power lines are connected with the exterior from an outgoing line waterproof ring, the motor isenergized in the forward direction and drives the lock rod to move, the lock rod begins to conduct the movement stroke for a certain distance, the microswitch is triggered, and then a signal is fed back. The upper shell and the lower shell are welded by ultrasonic waves. The electronic locking device is novel in structure, effectively saves the space, and is simple in manufacturing technology andlow in cost. In addition, the three-level deceleration design is adopted, and therefore an electronic lock can be flattened, the locking self-locking function is fulfilled, and locking is reliable.