Torque transmission tube and surgical instrument

A torque transmission tube, comprising:

• a first tube body, having a first channel and corresponding first and second ends in an extending direction of the first channel, wherein the first tube body comprises a plurality of strands of wires, each strand of wire spirally winds from the first end to the second end, the plurality of strands of wires spirally wind to form at least one spiral wire harness layer, the at least one spiral wire harness layer surrounds to form the first channel;
• a second tube body, having a second channel and corresponding third and fourth ends in an extension direction of the second channel, wherein the third end is connected with the second end, and the second channel is communicated with the first channel;
• wherein a minimum bending radius of the second tube body is smaller than a minimum bending radius of the first tube body.