Locking device and microwave oven

The utility model relates to a locking device and a microwave oven. According to the locking device, a first through hole is formed in a base, a slope extending towards the interior of the base is arranged on the hole wall of the first through hole, the angle formed between the slope and an orifice of the first through hole is controlled to be an acute angle, and meanwhile a first convex rib is arranged on the outer edge of a clamping hole. When locking operation is carried out, the first convex rib penetrates through the first through hole along the slope of the hole wall of the first through hole, at the moment, the buckle can be limited to a certain degree through matching of the first convex rib and the slope, the buckle can accurately pass through the first through hole, and the matching accuracy of the buckle and the first through hole can be effectively improved. Furthermore, when the locking device is used for a period of time and the position of the buckle has certain deviation, the buckle can be for