The invention relates to a bidirectional filter dispensing injection needle. The bidirectional filter dispensing injection needle comprises a needle tube, a needle seat and a filter device, wherein the needle tube is fixedly arranged on the front end of the needle seat; the filter device is arranged in a liquid medicine passage of the needle seat; a liquid pumping passage and a liquid pushing passage which are separated from each other are formed in the filter device; inlets and outlets of the liquid pumping passage and the liquid pushing passage are both separately connected with the liquid medicine passage; filter membranes are arranged on the inlet end of the liquid pushing passage and the outlet end of the liquid pumping passage; a check valve mechanism is arranged on the inlet end of the liquid pumping passage; a one-way valve structure is arranged in the liquid pushing passage. When the bidirectional filter dispensing injection needle disclosed by the invention is used in liquid pumping and liquid pushing, liquid medicine can flow respectively in the liquid pumping passage and the liquid pushing passage, filtered impurities which are filtered out during in a liquid pumping process are isolated between in the filter membranes between the check valve mechanism, which is arranged on the inlet end of the liquid pumping passage, and the outlet end, and impurities in a liquid pushing process are isolated in an injector by the filter membrane, so that the safety of liquid pumping and liquid pushing is ensured.