This work is about the structure of an external fixator for bone lengthening,A sliding fastener with sliding function is arranged on a fixed plate,The inner part of the sliding fastener is provided with double sliding blocks and double sliding bars,The screw thread on one of the sliding rods pushes the slide block to produce displacement；Under this structural design,The first fixing hole of the fixation plate can be fixed at one end of the osteotomy section by using the bone screw,And the second fixing hole of one slide block is fixed under the other end of the osteotomy section,Turn the threaded slider to move the slider,Let the attached broken bone have space to let the bone grow,So that the total length of the bone can be increased.本創作係關於一種骨延長外固定器之結構，其於一固定板上設置了具有滑動功能之滑動固定件，而此滑動固定件的內部係具有雙滑塊及雙滑桿，並且係以其中一滑桿上的螺紋推動滑塊產生位移；在此結構設計之下，本創作即可在使用骨螺釘讓固定板之第一固定孔固定於斷骨截斷面的一端，以及其中一滑塊的第二固定孔固定於斷骨截斷面的另一端之下，轉動具螺紋之滑桿而讓滑塊行進，讓所依附之斷骨具有間隙讓骨頭生長，使得骨頭之總長度能夠增加。
