The present invention relates to a percutaneous guided bone reaming tool device and its method. It mainly includes a blunt point guide pin and a guide screw tube, one end of said guide screw tube is made into a flat cone portion, its external surface is equipped with a helical toothed section. Said blunt point guide pin can be passed through skin and inserted into a bone tissue, said guide screw tube can be covered into said blunt point guide pin, and said flat cone portion and said helical toothed section can be clutched in said bone tissue, so that a working tube whose tube diameter can be covered into said guide screw tube can be punctured into said bone tissue along said guide screw tube. |