The invention discloses a liquid feeding device with a sealing strip with a layered structure and a liquid saving box. The liquid feeding device comprises a pressure air feeding device (7), a pressure cavity (8), a pressure feeding pipe (9), a liquid feeding pipeline (10) and an adsorbing filtering device (20), wherein the pressure air feeding device (7) is used for providing pressure for the pressure cavity (8) through the pressure feeding pipe (9); the pressure cavity (8) is capable of pressurizing liquid in the pressure cavity (8) and sending the pressurized liquid out through the liquid feeding pipeline (10), and the adsorbing filtering device (20) is arranged on the inner side end of the liquid feeding pipeline (10) and is used for filtering the liquid when the liquid feeding pipeline (10) absorbs the liquid from the pressure cavity (8); the outer side end of the liquid feeding pipeline (10) is used for sending out the liquid in a flowing manner, and the top of the pressure cavity (8) is provided with a liquid inlet (81).