Adjustable pressure type foam proportioning mixer

The utility model discloses an adjustable pressure type foam proportioning mixer. The adjustable pressure type foam proportioning mixer comprises a mixer body arranged in a foam tank body, the mixer body comprises a proportional regulating valve, a foam liquid valve body arranged above the proportional regulating valve and a pressure water valve body arranged below the proportional regulating valve, an upper valve cover is arranged on the foam liquid valve body, a proportional regulating mechanism is transversely arranged at the lower end of the upper valve cover, a proportional regulating plate is arranged at an inlet in the top of the foam liquid valve body, and a pressure regulating mechanism is transversely arranged at the lower end of the proportional regulating mechanism. A foam cavity communicated with the proportion adjusting inner cavity is formed in the foam liquid valve body, a piston rod is arranged in the foam cavity, a movable baffle is movably installed at the liquid outlet port, and a lower va