The utility model provides an extension apparatus of ankle or foot recovery. The utility model adopts a foot supporting board 1 and a lower leg mounting plate 2, which are movably connected, and securing straps are respectively arranged on the foot supporting board 1 and the lower leg mounting plate 2. Foot and leg are respectively fixed on the supporting board 1 and the lower leg mounting plate 2 with securing straps when used the utility model, thereby realizing traction recovery exercises. The utility model overcomes the problems of labor waste, short persistence time, and incapable quantization when recovery therapists draw off in free-hand, provides a convenient apparatus which has simple operation, easy control, and accurate curative effect for families, makes up the problems that the recovery therapy can't come to rehabilitation medical authorities as a result of various reasons, and reduces the burden of family nursing staff. The utility model is applicable to the prevention, training and treatment of foot and ankle articulation contracture complication which is caused by cerebral disease, brain injury, spinal marrow injury, foot and ankle fracture, and foot and ankle burn and the like.