Multi-stage screening device convenient for sorting raw coal of coal cleaning plant

The utility model relates to the technical field of raw coal screening, in particular to a multi-stage screening device convenient for sorting raw coal of a coal cleaning plant, which comprises a box body, a screening mechanism is arranged in the box body, and the screening mechanism comprises a fixed block, a spring, a screen, a sector gear, a waist-shaped frame, a tooth edge, a motor, a lower inclined surface block and an upper inclined surface block; the motor drives the sector gear to rotate, fixed blocks are fixedly arranged on the inner walls of the two sides of the box body, springs are fixedly arranged at the tops of the two groups of fixed blocks, a screen is fixedly arranged at the tops of the springs, and an upper inclined surface block is fixedly arranged at the bottom of the screen. A material is poured into the box body, the motor drives the sector gear to rotate, and the sector gear is intermittently meshed with the two groups of tooth edges in the rotating process; when the kidney-shaped frame