Abstract: Iodine and monoiodide are the basic industrial raw materials.Iodine is also a scarce resource.Only a few countries can be able to produce it.The enterprises of phosphorus chemical industry can recycle concomitant iodine in the process of managing phosphorite and the recycling technology is gradually mature. However，the recycle iodine is usually rough whose mass fraction ordinarily less 95%.In order to improve the value of iodine and meet the need of downstream product′s produc-tion，the technology of purified iodine is necessary to make the mass fraction of iodine over 99.5%.The recycle methods of concomitant iodine in the process of managing phosphorite were simply introduced.Then， the technology and operation ap-proach of acquiring purified iodine by sublimed method were discussed.At last，the common problems were analyzed and the targeted measures in the process of obtaining the concomitant iodine were provided.The mass fraction of iodine can achieve 99.5% completely through the industrial application.

Key words: phosphorite iodine, recycle, refining