The invention provides an embedded type microwave cooking appliance. The appliance is mounted in a mounting space reserved in a mounting cabinet, and a power socket protruding outwards is arranged on the left side or the right side of the rear wall of the mounting space; a containing groove big enough to contain the power socket and a power line is formed in the position, opposite to the power socket of the mounting space, of a shell of the embedded type microwave cooking appliance. The power line is led out of any groove wall of the containing groove, after the embedded type microwave cooking appliance is arranged in the mounting space, the power socket stretches into the containing groove and is inserted with the power line in a matched manner, and due to the design, the interference problem of the power socket and the space of a rear outer cover of the embedded type microwave cooking appliance is solved, the utilization rate of the mounting space by the embedded type microwave cooking appliance is improved, the depth of a microwave cavity of the embedded type microwave cooking appliance can be increased, and the cooking space of products is improved.