Cabinet door lock

A cabinet door lock, which comprises a controlling device, a lock box with a square-cavity, lock-tongue components arranged in the square-cavity of the lock box and a transmission mechanism driving the lock-tongue components to move, is characterized in that: the inside of the lock box is provided with a PCB plate connected with the controlling device, the transmission mechanism is a gear rack mechanism getting power from a motor, which is electrically connected with the PCB plate and the output shaft of which is connected with the gear, and the rack is connected with the lock-tongue components. The lock-tongue components are provided with a stop lever restricting the stroke of the rack, besides which an alarm switch is arranged. By using the gear rack transmission mechanism to replace the present slider or other transmission mechanisms, the utility model realizes the locking of opening and closing the door and the cabinet, fully utilizes the spatial structure, reduces the size of the whole lock, has a safe a