Simple bedridden training device for preventing lower limb deep venous thrombosis and prevention method of simple bedridden training device

The invention discloses a simple bedridden training device for preventing lower limb deep venous thrombosis and prevention method of simple bedridden training device. The bedridden training device comprises a coating assembly and a sole elastic band, the coating assembly comprises a flexible band and an air bag, the two ends of the flexible band are provided with a first connecting piece and a second connecting piece which are matched with each other respectively, a plurality of third connecting pieces are arranged on the side opposite to the side, wrapping the lower limbs of the human body, of the flexible band; the air bag is connected with the side, wrapping the lower limb of the human body, of the flexible band, and the end, internally communicated with the air bag and close to the foot of the human body, of the air bag is provided with a telescopic cavity larger than a body at the other end. Fourth connecting pieces corresponding to the third connecting pieces are arranged at the two ends of the sole ela