Valve mounting assembly, air conditioner outdoor unit and air conditioner

The embodiment of the utility model provides a valve mounting assembly, an air conditioner outdoor unit and an air conditioner, and the valve mounting assembly comprises a side plate, a valve plate and a shielding structure; the side plate is provided with a receding opening, the valve plate is provided with an outer surface, an inner surface and a first valve installation notch penetrating through the outer surface and the inner surface, the outer surface and the inner surface are opposite, the valve plate is installed at the receding opening, and the side plate shields the opening position of the first valve installation notch. A valve receding space and an interval space which are located on the two opposite sides of the first valve installation notch respectively are formed between the outer surface and the side plate. The shielding structure is located in the interval space. The valve mounting assembly provided by the embodiment of the utility model has a better rat-proof effect.