Abstract: Aiming at the limitations of exploration investment and exploration workload which being used in the evaluation of regional exploration progress，such as the different analysis conclusion caused by statistical caliber and the limitation of reflecting regional difference background conditions，this paper presents a group of calculation method of the exploration activity index.In addition to the calculation method of the exploration activity index being used in the single exploration right, this paper also presents the calculation method of the static index of exploration activity in which is used lateral comparison between different exploration areas.Furthermore，the third one is the calculation method of the cumulative index of exploration activity in which is used longitudinal comparison of the same area.Based on the comprehensive analysis, this paper preliminarily summarizes 8 different types of areas and presents the SIEA -OR_PA curve.The results show that the calculation method is operable; the data source is timely, and the results can reflect the real situation objectively.