Objective To evaluate the clinical effect of infrapopliteal arterial balloon angioplasty in the treatment of ischaemic diabetic lower limbs.Methods 53 cases of ischaemic diabetic lower limb containing 64 ischeamic limbs were treated with infrapopliteal angioplasty by Amphirion Deep Balloon.Observation of clinical remission including the ulcers was carried out before and after the procedure.Results 119 ateries of the 53 cases were chosen for PTA and 101 PTA in 50 cases were accomplished,with technical success rate of 84.9%.All the 50 patients got clinical remission including the shrinkage of ulcers and none amputation.Conclusin Infrapopliteal arterial angioplasty is effective,minimal invasive and safe for the ischaemic diabetic lower limbs.