Building construction material surface spraying device

The utility model relates to the technical field of building construction, and discloses a building construction material surface spraying device which comprises a supporting frame, a supporting plate is installed at the top of the supporting frame, a moving groove is formed in the top of the supporting plate, and a clamping rotating mechanism is installed at the bottom of the supporting plate. And a movable paint spraying mechanism is fixedly assembled on the outer wall of the supporting frame, a protection plate is installed at the top of the movable groove, a mounting frame is installed at the bottom of the protection plate, and an electric heating piece is installed on the inner wall of the mounting frame. Paint is extracted from a paint box through a paint pump into a paint feeding pipe to spray a steel pipe, meanwhile, a moving servo motor rotates to drive a lead screw to rotate, a moving block is driven to do repeated transverse movement on the lead screw, and therefore the problem that when paint spra