Fused salt storage tank for storing salt

The utility model discloses a fused salt storage tank for storing salt. The fused salt storage tank comprises a tank body, an inner thermal insulation layer, a driving part, a heating assembly, an outer thermal insulation assembly and a drainage pump, wherein the outer thermal insulation assembly and the drainage pump are arranged outside the tank body; a molten salt inlet, a molten salt outlet and a water inlet are formed in the tank body, the inner heat preservation layer is bonded to the inner wall of the tank body, liquid is arranged in the tank body, the driving part is fixed to the inner top face of the tank body, the output end of the driving part is meshed with the heating assembly, and an annular groove is formed in the tank body; the heating assembly comprises a plate body rotationally connected into the annular groove, an auxiliary gear and a plurality of heat supply parts. The auxiliary gear is fixed to the upper end face of the plate body and meshed with the output end of the driving part, and th