The invention discloses a water-based reflective coating process system. The water-based reflective coating process system comprises a dispersing unit and a filling unit; a discharging opening is formed in the bottom of the dispersing unit; the filling unit comprises a conveying track and a material stacking device; the material stacking device is arranged on the conveying track and moves in the length direction of the conveying track; the conveying track is a closed annular rail, and the stacking device is driven to do periodic movement; the stacking device comprises a base and a bracket; a rotating disc is embedded at the upper end of the base; a first groove body and a second groove body are symmetrically arranged at the two ends of the bracket in the length direction; the first groovebody and the second groove body are respectively arranged on the two sides of the rotating center of the bracket; material barrels are placed in the first groove body and the second groove body; the first groove body and the second groove body rotate together along with the rotating disc, so that periodic continuous filling can be realized, the carrying frequency of the material barrels is reduced, and the filling speed is improved.