Turbo-charged pneumatic wrench

The invention discloses a turbo-charged pneumatic wrench. The turbo-charged pneumatic wrench comprises a turbo-charging device; one side of the turbo-charging device is connected with the input end of an air inlet pipeline and the output end of an exhausting pipeline, and while the other side of the turbo-charging device is connected with the output end of a pneumatic pump; air in the pneumatic pump flows into the air inlet pipeline through the turbo-charging device; the redundant waste air in a pneumatic engine flows into the turbo-charging device through the exhausting pipe to realize charging. The turbo-charged pneumatic wrench has the advantages that the existing impact type pneumatic wrench is improved, the turbo-charging device is used for charging, so that the pressure of the air conveyed to the air inlet pipeline of the wrench is raised, the pressure of the air conveyed to the pneumatic engine of the wrench during once pinching is kept constant, and as a result, the torque control performance is realized.