The invention relates to a pressure filter machine, which is an improvement on the filter press. The invention provides a filter press which not only works continuously and automatically, but also can increase the filtration pressure and is convenient for vehicle-mounted movement. The present invention has a cylinder (1), has shaft (24) in its center, and rotating plate (14) is arranged on the shaft and rotates clockwise and anticlockwise alternately with the shaft at the same angle, left dividing plate (9), right dividing plate ( 7) It can move up and down, and the filtered filter cake can be moved from the partition to be emptied into fan-shaped holes, and discharged from the cylinder (1), and the filtrate passes through the rotating plate filter (36) and the rotating plate (14). The clapboard filter screen (37) on the clapboard, the sump (35), the left drain pipe (8), and the right drain pipe (6) are discharged; the filtrate is discharged by the pump (44) through the feed left valve ( 39), the feed right valve (40), the feed left pipe (11) feed right pipe (5), and the pressure limiting valve (38) enters the filter chamber. The present invention can continuously and automatically perform pressure filtration. In addition to the pump pressure of the original technology, the filtration pressure also increases due to the rotation of the rotating plate (14) to reduce the volume of the filter chamber, thereby saving labor, reducing labor intensity and improving automation. In addition, it also improves the filtration efficiency and filtration quality.