Multifunctional gravity traction bed

The invention relates to a multifunctional gravity traction bed which comprises a head supporting frame, an upper limb supporting frame, a lower limb supporting frame, a shank supporting frame, an L-shaped support and a supporting frame. A head bed plate is arranged on the head supporting frame; an upper limb bed plate, a lower limb bed plate and a shank bed plate are correspondingly arranged on the upper limb supporting frame, the lower limb supporting frame and the shank supporting frame in a left-right sliding manner; a tension and compression sensor used for feeding back traction pressure and a power-losing type electromagnet used for controlling whether the bed boards slide relatively or not are arranged between the bed boards. Under the action of gravity component force, traction on the cervical vertebra, the lumbar vertebra and the knee joints can be achieved, compared with a traditional device for completing traction through mechanical force, traction on a patient is smoother and more appropriate, the