Different desulfurization processes have their applicable scope of sulfur content.When large-scale desulfurization is being conducted, the process of absorption/regeneration alcohol-amine method is used;when medium-sized desulfurization is being performed (sulfur yield of 200 kg/d~20 t/d), the process of liquid phase oxidation (REDOX) is usually adopted, such as Lo-Cat, Sulferox and anthraquinone method.But the above two process are not applicable for small devices with daily sulfur production between a few kilograms to hundreds of kilograms.In principle, solid desulphurizing reagent or liquid sulfur removal agent should be selected and the process can be regenerated or non-regenerated.From the mid-1990, to accelerate the development and utilization of remote distributed gas wells in Sichuan and Chongqing area (very low sulfur content), the institute of natural gas technology from PetroChina Southwest Oil & Gasfield Company had set up more than 40 sets of ferric oxide sulphur removal devices with solid desulphurization reagent and successfully developed highly-efficient ferric oxide solid sulphur removal agent CT8-6.Represented by CT8-6, the technical performance of ferric oxide solid sulphur removal agent and the process flow and design points of sulfur removal device have been briefly introduced.It is concluded that the sulfur removal process of ferric oxide solid sulphur removal agent is mature with simple process, easy operation and maintenance, lower equipment investment and operation cost, and is suitable for small-sized desulfurization. This paper provides reference for the development of sulfur-containing gas well with lower sulphur content.