The utility model provides an outdoor regulator cubicle cabinet lock watertight fittings relates to electrical equipment technical field, including the cabinet door, be equipped with the cabinet lock on the cabinet door, the cabinet is locked in a mounting box, and mounting box one side is open structure and opening leanin in proper order from bottom to top, mounting box top integral type is connected with the baffle, and the baffle side is the side that corresponds of salient mounting box all, and an apron top articulates on the baffle bottom surface and can cover the opening completely, still be equipped with on the baffle bottom surface and be used for preventing rainwater from apron and waterproof articulated of getting into on the baffle, the utility model discloses simple structure has completely cut off the erosion of rainwater to the tapered end, also can unblank very conveniently.