Fine tuning peg for huqin-class musical instrument

The present invention provides a fine tuning peg for a huqin-class musical instrument. A planet decelerator is arranged at the rear portion of a hollow peg body, an input shaft of the planet decelerator is connected with a rotary knob of the rear end of the peg body, a winding tuning peg is arranged in the peg body, an output shaft of the planet decelerator is connected with one end of the windingtuning peg, the other end of the winding tuning peg is extended out of the peg body, the portion of the winding tuning peg extending out of the peg body is sleeved with a string hanging device, a string passing hole is arranged at the portion of the winding tuning peg extending out of the peg body, the string hanging device is provided with a pair of through holes, and a hollow pin penetrates thestring passing hole and the pair of through holes. The hollow pin passes through the winding tuning peg and the string hanging device to reliably fix the string hanging device on the winding tuning peg. The fine tuning peg is