Purpose:to explore the application of double lower limbs weight full-length in lower limbs value Methods: collected from March 2014 to March 2016, the lower limb trauma application extension of 45 patients with postoperative llizarow technology, 45 cases of patients with lower extremity all photography, application island ferry fully digital photography the joining together of big flat perspective - photography system function to get weight all lower limb length, according to the image measuring hip knee - ankle Angle 180 ° [- (measurement of hip - Angle of knee, ankle)] get deformity Angle, then according to the measured deformation Angle and the bone healing after bone cutting do correlation analysis. Results: the abnormal intraoperative bone cutting Angle and high correlation (= 0.708, P < 0.01) with intraoperative bone cutting deformation Angle regression analysis, the deformation Angle and intraoperative bone cutting length linear relationship exists, and extended to 10% after bone cutting, no new bone scabs, extended to 20%, the visible callus of fuzzy image, extend to 30%, obviously increase the amount of callus and bone cortex began to appear in the section in the extremities. With the extension of the mineralization time, at the ends of the bone cortex to rendezvous, gradually appeared medullary cavity, a clear demarcation between the cortical and medullary cavity, the callus strong healing, extend the body line of force, no malunion Conclusion: lower limb with a total length of splicing photography can be accurate measurement of body force line and the Ilizarov technique combined with minimally invasive cortical bone osteotomy gradually correct limb deformities provides important information.