Raw material mixing device for building construction

The utility model relates to the technical field of building construction, in particular to a raw material mixing device for building construction, which comprises a mixing box, the middle of the mixing box divides the mixing box into two independent storage spaces through a vertically arranged partition plate, and long-strip-shaped material passing openings are formed in the partition plate at equal intervals. Mixing cylinders are fixed to the two sides of the top of the mixing box correspondingly, the two mixing cylinders communicate with the two storage spaces correspondingly, a feeding hopper is arranged on the side wall of each mixing cylinder, a movable cover is arranged on each feeding hopper, a piston plate is installed in each mixing cylinder in a sliding mode, and a pressing rodis perpendicularly connected to the upper portion of each piston plate; and the upper end of the pressing rod is vertically connected with a connecting rod, the top of the mixing box is fixedly connected with a supporting pla