Dust-free coal screening device and method

The invention belongs to the technical field of coal screening, and relates to a dustless coal screening device and method.The dustless coal screening device comprises a bottom plate and a screening box arranged on the bottom plate, the screening box comprises a first screening box, a second screening box and a collecting frame which are detachably arranged in sequence from top to bottom, and a first screening plate is arranged in the first screening box; a first screening plate is arranged in the first screening box, a second screening plate is arranged in the second screening box, disturbance assemblies are arranged at the positions, higher than the first screening plate and the second screening plate, in the first screening box and the second screening box correspondingly, two symmetrical toothed plates are fixedly connected to the bottom plate, and the two ends of each disturbance assembly are meshed with the toothed plates. The bottom plate is further provided with a thrust assembly used for pushing the