The invention discloses a water pump pressure switch, which comprises a sealed housing, wherein the lower part of the sealed housing is provided with a threaded joint, and transparent rubber keys capable of adjusting starting point and shut-down point pressure are arranged on a panel of the sealed housing; a signal circuit board assembly, a pressure gauge sensor assembly and a circuit board control module are arranged in the sealed housing, and DIP switches capable of setting starting and shut-down pressure points are arranged on the signal circuit board; the pressure gauge sensor assembly is provided with a pressure gauge, and the tail of a bourdon tube on the back of the pressure gauge is connected with a connecting strip; the tail of the connecting strip is connected with a magnetic steel seat, and two N-N magnetic steel pieces are arranged on the magnetic steel seat; and the magnetic steel seat is arranged on a magnetic steel seat support and can slide up and down in the magnetic steel seat support, and a linear Hall component is arranged on the circuit board control module and is positioned between the two N-N magnetic steel pieces. The water pump pressure switch provided by the invention has the advantages of high precision, low cost, stable operation and pressure display.