The invention relates to a high-stability and low-loss spraying device. The device comprises a kettle body, a kettle cover (3) as well as a ventilating structure and a spraying structure which are connected with the kettle cover, wherein the kettle body is used for accommodating a coating; the ventilating structure is used for producing a pressure environment inside the kettle body; the kettle body comprises an outer kettle body (1) and an inner cup (2); the inner cup (2) is fixed in the outer kettle body (1) and is used for accommodating the coating; the kettle cover (3) is connected with the outer kettle body (1); the spraying structure comprises a suction pipe (4) and a nozzle which are connected with each other; and the suction pipe (4) extends into the inner cup (2). Compared with the prior art, the device has the advantages of capability of saving the coating, low cost, capability of spraying the coating uniformly and the like.