Spray gun liquid storage cup with automatic breather valve assembly

A spray gun liquid storage cup with an automatic breather valve assembly comprises a cup body, a cup cover, the automatic breather valve assembly and a multifunctional adapter. The cup body and the cup cover are assembled through a clamping sealing structure, the cup body is in an inverted state during spraying operation, and the cup cover is located below the cup body; the cup cover is provided with a liquid outlet and an air inlet, a multifunctional adapter is assembled on the liquid outlet, connection with liquid inlets of different types of spray guns is realized through the multifunctional adapter, and an automatic breather valve assembly is assembled in the air inlet; the automatic breather valve assembly comprises a one-way air inlet valve and an air guide pipe, the one-way air inlet valve is communicated with one end of the air guide pipe, and the other end of the air guide pipe extends towards the bottom of the cup body. According to the utility model, through the innovative design of the cup cover s