Abstract: The Miaogou gold deposit, located in Fengxian County, lies within the Shangdan structural mixed rock belt. This recently discovered deposit in the Fengtai mining area contains seven distinct gold ore bodies, which are primarily layered and lenticular in shape. Due to these complex formations, calculating the deposit's resources presents significant challenges. 3DMine mining engineering software, developed by Beijing Sandiman Mining Software Technology Co., Ltd., is a comprehensive package that has been successfully used to estimate resources and reserves in numerous large-scale mineral deposits worldwide. The software's process includes organizing raw data, analyzing chemical samples, building ore body models, creating ore block models, assigning values, estimating resources, and conducting category analysis. This study focuses on the KT3-2 main ore body of Miaogou Gold Mine to demonstrate the fundamental principles and key technologies of the 3DMine resource estimation method. Special attention is given to the inverse distance weighting method for grade estimation and the completion of ore body resource calculations. The study compares these results with those obtained through traditional geological block methods and analyzes the factors causing differences in grade and resource quantity estimates. Initial findings indicate that the resource quantities estimated using 3DMine software show high reliability, making it a valuable tool for estimating mine resources in the region.