The invention discloses a medical traditional Chinese medicine grinding device. A fan is mounted at the inner side of an air inlet; a filtering screen plate is arranged at the bottom part of a coolingbox and a grinding box is arranged at the right side of a crushing box; a material opening communicated with a discharging opening is formed in the left side of the grinding box; a grinding plate isarranged at the inner side of the grinding box; a third motor is mounted at the top part of the outer side of the grinding box; an output shaft of the third motor is connected with a rotary rod whichpenetrates through the grinding box; the bottom part of the rotary rod is connected with a grinding disc; a discharging opening penetrates through the bottom part of the grinding plate; a dischargingpipe is arranged at the bottom part of the grinding box. According to the device disclosed by the invention, the cooling box is arranged so that the temperature can be rapidly reduced when traditionalChinese medicine raw materials are crushed in the crushing box, and a phenomenon that the drug property of the traditional Chinese medicines is reduced, caused by high temperature, is reduced; the device is used for primarily crushing the traditional Chinese medicine raw materials by driving a stirring rod through a first motor; the raw materials are ground through the grinding disc so that the grinding speed of the traditional Chinese medicine raw materials is improved.