The invention relates to the technical field of replacement of filter cloth of filter press, relates to a sludge treatment filter press with a function of easily replacing filter cloth. The filter press comprises a supporting rack, a press plate is fixedly connected in the supporting rack, the upper portion of the pressure plate is movably connected with a roller, the two sides of the roller are movably connected with a rotary shaft, a flow guide plate is movably connected to the portion, on the lower potion of the press plate, in the supporting rack, the two sides of the flow guide plate aremovably connected with spring blades, and the side, away from the press plate, of the flow guide plate is movably connected with a rolling body. Due to the action of an oblique plate arranged on the bottom, the gravity center of the rolling body is changed, so that the rolling body rotates; due to rotation, the filter cloth can be separated from the surface of the roller, while the filter cloth ispulled, the surface of the filter cloth can be scratched by the spring blades, when the rolling body rolls to the side away from the flow guide plate, water and sludge in a hollow channel can be separated out due to the action of gravity, and therefore, the effects that the using condition of the filter cloth is precisely controlled and the filter cloth is automatically replaced are achieved.