The invention discloses a hip joint protecting and supporting frame for treating femoral head necrosis. The hip joint protecting and supporting frame structurally comprises a first tightening fixationframe, a left reinforcing block, a left fixing disc, a left connecting rod, a connecting sleeve, an inner telescopic rod, an outer telescopic rod, a right connecting rod, a right reinforcing block, aright leg sleeve, a right fixing disc, a second tightening fixation frame, a third tightening fixation frame, an inner cushion, a fourth tightening fixation frame, an upper fixing sleeve, an upper pull strip, a middle clamping plate, a lower pull strip, a left leg sleeve, a tightening adjustment rod, an adjustment handle, first fixing rods, inner adjustment rods, connecting balls, bolts, connecting heads, clamping plates, nuts, second fixing rods, adjustment belts and fixing buckles. The hip joint protecting and supporting frame for treating femoral head necrosis can be matched for protectionand supporting of the body inside and the body outside and meanwhile can be moved in a safe range, and meanwhile the outside of the supporting frame can be quickly and conveniently fixed and dismounted.