The invention discloses a crushing machine with a function of improving the traditional Chinese medicine quality. The crushing machine comprises a crushing machine body. A horizontal conveyor belt is arranged above the interior of the crushing machine body, a material feeding opening is formed beside the left end of the conveyor belt, a plurality of crushing rollers are arranged above the conveyor belt, and a discharging opening exists between the right end of the conveyor belt and the crushing machine body; an impurity filtering mesh is arrange below the blanking opening, and the lower portion of the impurity filtering mesh is connected with an impurity collection cavity; a medicine push plate is arranged on the impurity filtering mesh, and the medicine push plate is connected with a push-pull rod; the left end of the impurity filtering mesh is connected with a first transport plate, a first crushing impeller set is arranged below the left end of the first transport plate, a second transport plate is arranged below the first crushing impeller set, and a second crushing impeller set is arranged below the right end of the second transport plate. By means of the crushing machine, the crushing efficiency and effect of traditional Chinese medicine can be improved; and meanwhile, impurities can be separated out in the preliminary stage of crushing, and the problem of quality caused by the impurities which are difficult to be separated after the medicine is fully crushed is avoided.