The invention relates to a
mechanical pressure switch, in particular to a
mechanical pressure switch capable of achieving high-precision rigidity compensation and a compensation method thereof, and aims to solve the problems that when a
mechanical pressure switch of an existing
attitude control power device is used, the spring rigidity is large, the
pressure sensitivity of the mechanical
pressure switch is reduced, and high-precision adjustment of a flow
system is difficult to meet. According to the technical scheme, the mechanical
pressure switch capable of achieving high-precision rigidity compensation comprises a microswitch, a shell, a
pressure sensing unit, a lever, a compensation unit and a reset unit, wherein the
pressure sensing unit is arranged on the shell, and the lever, the compensation unit and the reset unit are arranged in the shell. The microswitch is fixed in the shell; the
pressure sensing unit comprises a pressure sensing
piston and a pressure rod, and the pressure sensing
piston is installed on the shell; one end of the pressure rod is connected with the pressure sensing
piston, and the other end of the pressure rod extends into an inner cavity of the shell and acts on the lever in the anticlockwise direction; the invention further provides a high-precision rigidity compensation method based on the mechanical
pressure switch.