The invention relates to the technical field of furniture production, and specifically discloses a glue coating device of a splicing machine for furniture production. The glue coating device includesa box body. Four corners of the bottom of the box body are fixedly connected with supporting feet, and the center of the top of the box body is fixedly connected with a placing table, and grooves arearranged in all sides of the placing table. Side plates are fixedly connected to both sides of the top of the box body, and a top plate is fixedly connected to the tops of the side plates. A glue spray mechanism is arranged in the middle part of the bottom of the top plate. Through cooperation of the grooves, a through groove, air cylinders, air pumps, a movable plate, anti-shake mechanisms, servomotors, threaded rods, threaded blocks, movable clamping plates, slide grooves, sliders, bearings, fixed blocks and cushions. The advantages of limiting and fixing a plate are achieved, so that whenthe plate is glued, the plate can be effectively limited and fixed and is prevented from sliding, thereby reducing the labor intensity of a worker and facilitating the use for the worker.