The invention discloses a molding grinding wheel dresser which comprises a workbench, supporting legs, a driving motor, vertical columns and a top plate; the supporting legs are fixedly connected to the lower end of the workbench; the driving motor is fixedly connected to the upper surface of the workbench; the vertical columns are fixedly connected to the upper end of the workbench and is close to the outer side of the driving motor; the top plate is fixedly connected to the inner sides of the vertical columns, a hydraulic cylinder is fixedly connected to the front face of the top plate, anda grinding mechanism is installed at the lower end of the hydraulic cylinder; and installation bases are fixedly connected to the positions, close to the outer sides of the hydraulic cylinder, of thelower end of the top plate, and a moisturizing mechanism is installed at the lower ends of the installation bases. When the molding grinding wheel dresser is used, through cooperative use of a liftingbase, circular sliding blocks, a diamond pen and other structures, the effect of high adaptability is achieved, and through cooperative use of movable plates, atomizing spray heads, water inlet pipesand other structures, the effect of conveniently removing dust is achieved.