Contraction after a long time immobilization is a common sequale of the orthopedic patients. Low-load prolonged stretch has been proved a better method than high-load brief stretch. Prolonged stretch could change viscosity of the tissue and produce greater residual elongation. The study uses Light K.E. et al modified Buck's skin traction, combining hydrotherapy, muscle strengthing, ambulation training and joint mobilization to treat 7 patients who have knee flexion contractures after operations for ligament injuries or bony fractures. All of them have reached nearly normal range of extension. Angle of extension of the knee joint is very critical for gait pattern. Even limitation of few terminal degrees will influence posture of walking. So we prefer the knee extension as normal as possible. The direction of the traction used in the study is along with that of the tibia. So the effect is distraction of the knee joint to increase the femorotibial joint play in addition to elongation of the connective tissue. The traction is simple, non-stressful, and the result is excellent.