The invention discloses a vacuum booster valve body. The vacuum booster valve body comprises a valve body, and the valve body is internally provided with an inner disc. The interior of the valve bodyis arranged as a front cavity on the left side and a rear cavity on the right side through the inner disc, and a valve bowl is disposed in the valve body. The valve bowl is connected with a feedback spring through a vacuum valve, and the feedback spring is fixed to an operating rod through a spring seat. One end of the operating rod is rotatably connected with a pedal through a hinge pin, and theother end of the operating rod is connected with a rubber diaphragm. A pressing block is arranged on the right side in the valve body, and the right end of the pressing block is connected with a master cylinder push rod. The vacuum booster valve body is improved to a certain extent on the basis of an existing structure, the structural strength of overall parts is improved, the sound attenuation effect is enhanced, noise generated during braking is reduced, and the service life of the parts is prolonged.