Diaphragm type pressing plate structure of pressure filter

The invention discloses a diaphragm type pressing plate structure of a pressure filter. The diaphragm type pressing plate structure comprises a substrate, wherein the substrate is provided with filtering chambers, a feeding channel, a filtrate discharging channel and an extruding medium channel; two filtering chambers are correspondingly formed at the two sides of the substrate; the filtering chamber at each side is internally provided with a diaphragm; the corresponding filtering chamber is divided into an outer-side filtering cavity and an inner-side extruding cavity by the diaphragm; the extruding cavity in the filtering chamber at each side is communicated with the extruding medium channel by a corresponding flow-dividing channel; the filtering cavity in the filtering chamber at each side is communicated with the feeding channel by a corresponding main dividing channel; and a balanced dividing channel is arranged between the main dividing channels of the filtering chambers at the two sides of the substrat