Spraying device for house building construction

The utility model relates to a spraying device for house building construction, which aims to solve the technical problem that the wall surface is not uniformly sprayed easily due to the fact that a constructor holds a spraying machine to spray the wall surface for a long time at present, and comprises a trolley and a lifting mechanism, the lifting mechanism is arranged at the bearing end of the trolley; the motor drives the lead screw to rotate in the mounting bin through the bevel gear set, the lead screw rotates to drive the bearing plate to ascend or descend along the guide rod, then the spray head is driven to ascend or descend, and the spraying efficiency and uniformity of the wall face are effectively improved; a servo motor drives a long shaft through a driving gear and a driven gear, the long shaft drives a rotating plate to rotate with the long shaft as a center shaft, then the spraying pitching angle of a spraying head is adjusted, and spraying is conducted on the top and the bottom of the wall fac