A power circuit module is provided. The encapsulated power circuit module comprises: a pressure plate comprising a protrusion body; a frame; and a substrate bearing a power circuit, the power circuit comprising at least a power switching device; the frame is provided between the substrate and the pressure plate, the frame supports the pressure plate, and a substantially closed space is formed by the substrate, the pressure plate and the frame; and when an external force is applied on the pressure plate, the protrusion body press against the substrate and is in insulation contact with the substrate, and the external force is transmitted evenly on the substrate.