The invention is a bone lengthening external fixation device,Include subjectThe first slider and the first screw,The first slider is arranged at the hollow part in the center of the main body,The first screw is screwed with the first main screw path through the first slider,Rotating the first screw rod can push the first slider to move along the hollow part through the thread；The creation can also include a second slider and a second screw,The second slider is also arranged at the hollow in the center of the main body,The second screw is screwed with the second main screw path through the second slider,Rotating the second screw rod can push the second slider to move along the hollow part through the thread；Through this creation,The distance between the broken bones fixed on the body and the first slide or fixed on the two ends of the first slide and the second slide respectively can be adjusted,The distance between the broken bones increased gradually,The broken bone can be prolonged by growing callus.本創作為一種骨延長外固定裝置，包含主體、第一滑塊及第一螺桿，第一滑塊設置於主體中央之鏤空處，第一螺桿與貫設於第一滑塊之第一主螺道螺合，旋轉第一螺桿可透過螺紋推動第一滑塊沿鏤空處移動；本創作可另包含第二滑塊及第二螺桿，第二滑塊亦設置於主體中央之鏤空處，第二螺桿與貫設於第二滑塊之第二主螺道螺合，旋轉第二螺桿可透過螺紋推動第二滑塊沿鏤空處移動；透過本創作，可調整分別固定於本體與第一滑塊或分別固定於第一滑塊與第二滑塊之兩端斷骨之間距，使斷骨之間距逐漸加大，使斷骨可透過生長骨痂之方式延長。
