The utility model discloses a storage tank for producing a waterproof finishing agent. The storage tank comprises an upper fixing base, a lower fixing base and a storage tank body, sealing covers arearranged at the two ends of the storage tank body correspondingly, the upper fixing bases are arranged on the two sides of the upper end of the storage tank body correspondingly, the lower fixing bases are arranged on the two sides of the lower end of the storage tank body correspondingly, and a discharging opening is formed in the middle of the lower end of the storage tank body. According to theutility model, the universal wheels are accommodated in the accommodating grooves; the limiting fixing blocks are correspondingly fixed in the limiting fixing grooves to achieve overlapping fixing, concentrated overlapping stacking and transferring of the storage tank body are facilitated, the adjusting bolts are rotated to enable the universal wheels to extend out of the storage grooves, the storage tank can be transferred without external equipment through rotation of the universal wheels, and the transferring portability is improved; according to the storage tank, the storage tank body isarranged to be of the inclined structure with the two sides higher than the middle, so that a waterproof finishing agent in the storage tank body can be completely discharged from the discharging opening, and residues are avoided.