Abstract From August 1983 to June 1995, 15 cases of middle and upper 1/3 femoral malignant tumors were treated by removal of compete femur and functional reconstruction of both hip and knee. The key procedure was: arrested the artery and vein by rubber band with a nail put in the iliacbone, or exposed the atery and vein directly in the inguinal region. After the disarticulation of the hip and knee, the whole femur with the tumor was removed.Rotated the lower leg 180° and put an artificial femoral head on the upper endof tibia, kept the nerve, artery and vein intact or anastomosed the vessels. Three weeks after surgery, an artificial leg was put on and began to do functionalexercises. From 1～12 years follow-up, no mortality and no local recurrence or metastasis were noted. The function of the reconstructed hip and knee was satisfactory. This procedure could both provide a radical excision of the tumor and obtain a relatively good functioning hip and knee joints.