Paint spraying device for building structural component

The utility model provides a paint spraying device for a building structural member, and relates to the technical field of paint spraying processing. A paint spraying device for building structural components comprises a machining table and a movable frame sliding on the machining table, walking wheels used for controlling the movable frame to slide are rotationally connected to the two side faces of the movable frame, a sliding rod is fixedly connected to the interior of the movable frame, and a movable block is slidably connected to the sliding rod; a paint spraying head is installed at the bottom of the movable block, a reciprocating mechanism for controlling the movable block to slide on the sliding rod in a reciprocating mode is arranged on the movable frame and comprises a rotating disc rotating on the inner top wall of the movable frame, and an extrusion block is installed at the bottom of the rotating disc. The sliding block is controlled to slide in the sliding groove by rotating the adjusting screw