Reinforcing structure of liquid storage tank

The utility model relates to the technical field of spraying, in particular to a reinforcing structure of a liquid storage tank which comprises a base located at the bottom, a liquid storage cavity located above the base and a supporting part connected with the base and the liquid storage cavity. A storage area with three hollowed-out faces is arranged corresponding to the supporting part and located between the base and the liquid storage cavity, a supporting piece is arranged in the storage area, and the supporting piece comprises a bottom plate embedded in the base, a top plate embedded in the liquid storage cavity and a first reinforcing rib connected with the bottom plate and the top plate. The sides, close to the supporting part, of the first reinforcing ribs are embedded in the supporting part, and the number of the first reinforcing ribs is at least two; a reinforcing structure such as the supporting piece is arranged on the supporting part in an embedded mode, the machining difficulty of the supporti