The invention discloses a foot passive training device for preventing deep venous thrombosis. The device comprises a fixing plate, bandages, a first rotary plate, a second rotary plate, a connecting band, a first connecting block, a second connecting block, a supporting plate, an electric motor, a rotating shaft, a first belt pulley, a first cam, a first connecting rod, a second belt pulley, a first belt, a second connecting rod, a third belt pulley, a second cam, a second belt. The foot passive training device for preventing deep venous thrombosis has the advantages of being smart in structure, powerful in function and simple in operation. The training device achieves foot training for patients with no need for manual operation of medical staff, saves both time and labor, thereby not only reducing the working strength of the medical staff, but also effectively improving the foot training effect for patients.