The present invention relates to a drilling guide mechanism for a free-locking fixed system that engages with a bone at a free angle within a predetermined range to induce mating. More specifically, it is not limited to a specific angle and can be changed to a free angle within the system range. It is possible to measure the depth of penetration of the drill during drilling, so that the operator can easily work with the desired depth of the drill. It relates to a drilling guide mechanism. To this end, the present invention relates to a drilling guide mechanism of a free lockable locking system for orthopedic implants composed of a metal plate provided with one or more fasteners and a reference tool together with a screw that engages with a bone at a free angle within at least a predetermined range to induce mating. , A support plate having a shape that can be in close contact with the upper surface of the metal plate, the guide plate and the fixture are formed in a position and number corresponding to the fastener and the reference sphere； A control plate having a predetermined sized mounting hole formed on an upper portion of the support plate, and provided with a guide tube which is detached and mounted on the mounting hole to align the posture of the drill； Includes； the guide, including a plurality of variable pillars whose height is adjusted so that the posture of the drill is switched between the support plate and the control plate, and a joint that induces a direction to be changed according to the height at both ends of the variable pillars； The pipe is formed with a flange-shaped extension and is detached and mounted on the mounting hole of the throttle to guide the drill, and the upper side of the guide tube is formed into a cylindrical shape having a hollow, which is extended and coupled to the upper side of the guide tube, and accommodated. At the same time, the body for measuring the depth of entry is formed to measure the depth of entry of the drill.본
