The invention provides a novel pressure switch, which belongs to the technical field of machinery, and solves the problems that the existing pressure switch is slow in pressure sensing and complicated in structure. The novel pressure switch comprises a main body with a cavity; a water inlet and a water outlet are formed in the main body; a check valve is arranged in the cavity of the main body; a water outlet ring is fixedly connected into the cavity of the main body; magnetic steel is arranged on the upper end of the check valve; a pressure sensor is arranged on the main body; a control box is arranged on the main body; a circuit board is arranged in the control box; the pressure sensor is connected with the circuit board; a controller and a reed pipe are connected onto the circuit board; and the reed pipe can sense the magnetic steel. The pressure switch provided by the invention has the advantages of sensitiveness in sensing, and simpler structure.