Compound cleaning operation machine for flax threshing materials

The invention relates to the technical field of flax processing, in particular to a compound cleaning operation machine for flax threshing materials. Comprising a rack, an indent cleaning device located on the outer side of the rack, a spiral feeding device, an airflow cleaning device and a vibration and specific gravity integrated screening device, wherein the spiral feeding device, the airflow cleaning device and the vibration and specific gravity integrated screening device are integrally arranged on the rack. The cleaning mode of the operation machine is that airflow cleaning is carried out firstly, then air screening is carried out, and specific gravity cleaning is combined; finally, combined with compound operation of indent cleaning, the flax threshing materials pass through all cleaning links step by step, and the high impurity rate and the high loss rate caused by a single cleaning mode are reduced; the screen surface of the vibration screen and the screen surface of the specific gravity screen are i