Filter plate assembly used in filter press

The invention discloses a filter plate assembly used in a filter press. The filter plate assembly comprises a filter plate body (1) and a square protrusion (7) arranged on the edge of the filter plate body (1). A plurality of protrusions (2) are uniformly distributed on the upper surface of the filter plate body (1). The protrusions (2) are positioned within the square protrusion (7). Water guide grooves (3) are formed among the protrusions (2). A plurality of filter holes (4) are uniformly distributed on the water guide grooves. The projections of the protrusions (2) on the filter plate body (1) are kidney-shaped. The axes of the protrusions (2) are parallel to the axes of the protrusions (2) on their left and right sides. The axes of the protrusions (2) are on a same straight line with the axes of the protrusions (2) on their upper and lower ends. The filter holes (4) are positioned between protrusions (2) with parallel axes. The filter press filter plate assembly provided by the invention has the advantages of low resistance, high flow speed, large filtering area, and high filtering efficiency.