A filter plate assembly for filter press

The utility model discloses a filter plate assembly for a filter press, which comprises filter plates A and filter plates B which are arranged at intervals, annular water bag cavities are arranged ontwo sides of each filter plate A, annular material cavities are arranged on two sides of each filter plate B, and the adjacent annular water bag cavities and annular material cavities form a closed filter pressing cavity; central holes of the filter plate A and the filter plate B are communicated to form a feeding channel, glands are arranged on two sides of the central hole of the filter plate A,and a feeding hole for communicating the feeding channel with the filter pressing cavity is formed in the outer circumferential side of each gland; a rubber water bag is arranged in the annular waterbag cavity, the rubber water bag squeezes materials in the filter pressing cavity through water injection expansion, a water inlet and outlet is formed in the bottom of the filter plate A, and the water inlet and outlet is com