Lower limb exercise device for orthopedic nursing

The lower limb exercising device comprises a base, and a position adjusting device, a connecting device, a backrest, a positioning device and a pedal device are sequentially arranged on the surface of the base. The position adjusting device is movably connected with the backrest through a connecting device, and the positioning device is slidably connected with the pedal device; related rehabilitation training of knee joints and ankle joints is carried out through the pedal device; hip joint related rehabilitation training is carried out through the first positioning device; the distance between the positioning device and the backrest can be adjusted to adapt to people of different heights, meanwhile, the positions of the lower limbs can be fixed through the positioning device, and it is guaranteed that the rehabilitation training effect cannot be affected due to shaking and even falling of the lower limbs during rehabilitation training; the angle of the backrest can be adjusted according to the requirements o