The invention provides a diaphragm spraying production line. The diaphragm spraying production line comprises an unwinding mechanism, a coating mechanism, a drying oven and a winding mechanism; the coating mechanism comprises a roller coating mechanism and a spraying mechanism which are used for coating the same side of a diaphragm with slurry, the unwinding mechanism and the winding mechanism arearranged on the same side of the drying oven, the roller coating mechanism and the spraying mechanism are arranged on the two sides of the drying oven correspondingly, and the roller coating mechanism is arranged between the unwinding mechanism and the drying oven; the spraying mechanism comprises a spraying device and spraying guide rollers used for unfolding the diaphragm, the spraying guide rollers comprise the upper guide roller and the lower guide roller, and a material receiving groove used for recycling vaporous slurry is formed below the spraying device; and the diaphragm is unwound from the unwinding mechanism and sequentially passes through the roller coating mechanism, the drying oven, the side, facing the spraying device, of the upper guide roller, the side, facing the spraying device, of the lower guide roller and the drying oven to reach the winding mechanism. According to the diaphragm spraying production line, the vaporific slurry can be prevented from condensing and dropping onto the surface of the diaphragm, the vaporific slurry can be recycled, and the same surface of the diaphragm can be coated without additionally arranging an overturning frame.