Flexible controllable knee joint booster for senile sarcopenia patients

The utility model discloses a flexible controllable knee joint booster for old patients suffering from sarcopenia. The flexible controllable knee joint booster comprises a lower limb connecting plate, a lower limb supporting plate and an upper limb supporting plate. A lower limb supporting plate is fixed to the bottom end of the lower limb connecting plate, a supporting screw rod is fixed to the center of one side of the lower limb supporting plate, the supporting screw rod is rotationally sleeved with an upper limb connecting plate, and an upper limb supporting plate is fixed to the top end of the upper limb connecting plate. A connecting structure capable of being adjusted in multiple ranges is adopted, when a patient moves, after the upper limbs and the lower limbs move to any angle, the lower limb supporting plate and the upper limb supporting plate can be fixed, the situation that fine angle adjustment cannot be conducted when the patient moves due to grade distinguishing is avoided, and the moving comfo