Huangmazi potatoes were used as raw materials and effects on sprouting inhibition and physiological properties of dormancy-breaking potato tubers by the treatment of iodine vapor during shelf-life were studied. The result showed that potato tubers which exposed to iodine-saturated vapor for 6 days could inhibit the sprouting and maintain the soluble solids content and hardness effectively. It could also reduce the tubers respiration intensity,slowed down the rise of the relative conductive rate,inhibit the activities of polypenoloxidase( PPO),peroxidase( POD) and phenylalanine ammonialyase( PAL).