Medicine grinding injection device

The utility model discloses a medicine grinding injection device which comprises a sealing piece, an injection barrel and a piston component. A connector is arranged at one end of the injection barrel, an injection channel is formed in the connector, and a containing cavity is formed in the injection barrel and communicated with the injection channel; the sealing piece is matched with the connector in an inserting manner; one end of the piston component is arranged in the containing cavity and slides in the containing cavity, the other end of the piston component extends out of the containing cavity, and a grinding space used for grinding external medicine is formed between the end face of the piston component and the inner wall face of the injection barrel. According to the medicine grinding and injecting device, grinding is directly carried out in the injector, the defect that medicine dosage is inaccurate due to medicine waste caused by using a mortar can be effectively overcome, warm water is directly add