The invention relates to an inclined cleaning vibrating screen. The inclined cleaning vibrating screen comprises four supporting legs. Vibrating springs are mounted at the upper ends of the four supporting legs. An obliquely mounted vibrating tank body is fixedly connected to the upper ends of the vibrating springs. A transmission plate is arranged at the bottom of the vibrating tank body. A vibrating motor is mounted on the transmission plate. A mounting frame is arranged in the vibrating tank body. A vibrating mesh piece is mounted in the mounting frame. Power assisting devices are mounted in the positions, between the two side walls of the vibrating tank body, above the vibrating mesh piece at intervals. Each power assisting device comprises a rotation shaft. The two ends of the rotation shaft are rotationally mounted in the positions, on the two side walls of the vibrating tank body, above the vibrating mesh piece through bearings. The power assisting devices provide assistance, facing a discharging outlet, for rice stems, the rice stems are advanced more rapidly and smoothly and prevented from being stacked on the vibrating mesh piece, the probability of rice stem stacking, stuck and stopping is lowered, and the screening efficiency is improved.