This paddy winnowing machine has a wide range for applications, according to different variety of the crops with different capacity of weight, it works by manual controlled wind speed to get the efficient sorting and winnowing of the plumpness of seeds (blighted, worm-eaten and mouldy grains) and the wastes (stalks, leaves and husks etc.), such as grains, corns, wheat, sorghums, millets, rapeseeds, sunflower seeds, beans (soybeans, coffee beans); also it can achieve a very good selective effect on tea leaves, tobacco leaves, medicinal materials.