Adjustable pressure switch

The utility model discloses an adjustable pressure switch which comprises a switch lower shell, a switch upper shell is arranged on the switch lower shell, a microswitch is arranged on the lower end face in the switch lower shell, a driven gear is arranged outside the microswitch, and the driven gear is located on the lower end face in the switch lower shell and is rotationally connected with the switch lower shell. A driven gear is fixed on the switch upper shell, a screw cylinder is fixed on the driven gear, a pressing rod is arranged in the switch upper shell, a clamping block is arranged at the end of the pressing rod, a sliding rod is arranged at the bottom of the clamping block, a spring is sleeved outside the sliding rod, the sliding rod penetrates through a screw ring, and the screw ring is in threaded connection with the screw cylinder. The driven gear is arranged to be connected with the screw cylinder, when the screw cylinder rotates, the screw ring moves upwards so that the spring can be compresse