The present invention discloses a high-torque ratchet wrench. This high-torque ratchet wrench comprises a wrench body having a driving aperture and a handle, and a drive member is disposed in the driving aperture and an axial position-limiting mechanism is disposed between the driving aperture and the drive member to limit the relative axial displacement. The external side wall of the drive member and the internal aperture side of the driving aperture form two cylindrical drive faces nested, wherein a first drive face is provided with a pin recess, a pin is rotatably mounted in the pin recess, a relief is disposed on the side face of pin, the pin is connected with a resilient reset member, the pin is rotated with the resilience of a resilient reset member, a relief is driven to stand out of the pin recess and contacts a second drive face, and the distance between the outermost end point of the relief and the central axis of the pin is greater than the minimum distance between the second drive face and the central axis of the pin. The ratchet wrench designs a unique structure used to transfer torque, greatly enhance the capability of torque transfer and simultaneously provide the whole wrench with a simple and compact structure, so that it is easy to use.