Abstract: As the total sulfur content in natural gas has a bearing on the pipeline safety and environmental emissions, various countries and organizations have established strict specifications on the total sulfur content indexes and have used these specified indexes as the important controlling indexes for evaluating the quality of the natural gas. The total-sulfur-content measurement techniques and standards have attracted growing worldwide concern and attention. Since 2011, on the strength of the experience and accumulated technology essences obtained during the sulfur-contained gas field exploitation of PetroChina Southwest Oil&Gasfield Company (SWOG), a great effort has been devoted to promoting the development of the international standards based on the upgraded domestic total sulfur content determination method. Additionally, the study on the international standards for the total sulfur content determination with the "oxidative microcoulometry method", the "ultraviolet fluorescence method" and the "gas chromatographic method" has been conducted consecutively to establish the international standard system for the determination. Currently, the international standards of the "oxidative microcoulometry method" and the "ultraviolet fluorescence method" have been established. In this paper, the main contents are about the summaries of the main workload and key technical points for the establishment processes of these two international standards. Besides that, the feasibility of using the "gas chromatographic method" to determine the total sulfur content for establish the relevant international standard is presented, and the proposal about including the "gas chromatographic method" into the international standard for the further steps is put forward.