To provide a method for separation and removal capable of separating and removing the impurities held between crude drugs as collected from the natural world and the deposits sticking to their surfaces and above all, the foreign matters included therein, in addition to soil, sand, stones, etc., and further, the fibrous roots, etc., fasciculated in the roots of the crude drugs.

Prior to the separation and removal of the impurities, etc., by manual separation from the crude drugs 10 as collected from the natural world, separating and removing means 30 is selected in compliance with the characteristics and shapes of the crude drugs, the impurities, etc., and an impulsive force is imparted to the crude drugs, the impurities, etc., and rubbing is imparted thereto by the separating and removing means 30 while the crude drugs, etc., are allowed to slip, by which the impurities, etc., are separated and removed from the crude drugs and the fine roots, etc., fasciculated in the roots of the crude drugs are cut off and removed.