The calculation of the lower limit of the geochemical anomaly and the map compilation are of key and basic importance in the interpretation and appraisal of geochemical anomaly.This paper deals with the determination of the threshold of the geochemical anomaly with VBA programming based on average value and two times of standard deviation,and the method for direct compilation of the discrete point position map with MapGIS.The VBA and MapGIS were combined with each other and applied on the basis of the authors' experience, with satisfactory result obtained. It is pointed out that VBA and MapGIS have wide application prospects in geology and mining industry.