Efficient winnowing and impurity removing equipment for grains and working method of efficient winnowing and impurity removing equipment

The invention discloses efficient grain winnowing and impurity removing equipment and a working method thereof, solves the problems that an existing grain winnowing and impurity removing device is prone to blockage, poor in cleaning effect and high in energy consumption in the prior art, and has the beneficial effects of being simple in structure, high in working efficiency, good in impurity removing effect and capable of saving energy. The shell is provided with a grain feeding part, one side of the grain feeding part is provided with an anti-blocking assembly capable of adjusting the grain falling speed, the grain feeding part is provided with a self-adaptive adjusting assembly on the other side of the anti-blocking assembly, and a grain falling opening is formed between the self-adaptive adjusting assembly and the anti-blocking assembly; the self-adaptive adjusting assembly can automatically adjust the opening angle of the grain falling opening according to the weight of grain entering the grain inlet part