With the popularization and application of Surpac and other 3D mining software，more and more exploration projects use 3D mining software to prepare the estimation reports of solid mineral resources. Although the solid mineral resource estimation report compiled with 3D mining software is much faster than the traditional 2D method of resource reserve estimation to some extent，it also faces the problem of manual operation steps，inconsistent estimation process，and difficult matching between estimation results and specification requirements. In order to improve the calculation efficiency and make the results meet the specification requirements，a semi-automatic method for solid mineral resource estimation has been developed in compliance with “Regulations of Solid Mineral Resources Estimation”. The development of this semi-automatic resource estimation method has been based on the secondary development technology which is provided by Surpac software. This new method has been developed by summarizing，from various geological exploration projects，the layouts of different types of exploration test locations as well as the characteristics and spatial distribution of the orebody. From this work，a set of instance data that can cover various exploration situations was then prepared as the objects of research. This new method is combined with the characteristics of the Resource Estimation Report prepared by Surpac 3D mining software，it has developed a technical process of mineral resource estimation using 3D mining software and in accordance with the specification requirements. Through computer programming，most of the operations in the process can be implemented by the developed program. Except for cross section interpretation and solid modeling which still needs manual operation，all of the other steps including entry of raw data，establishment of geological database，statistics of mineral grade，process of especially high mineral grade，estimation and validation of the block models，mineral resource estimation reporting，generating drawings and so on can be carried out using the automatic procedures. Therefore，the overall work for estimation of solid mineral resources has reached a degree of semi-automation.The three-dimensional resource and reserve estimation of Bayan Baolege silver-polymetallic ore in Alu Kerqinqi of Inner Mongolia Autonomous Region is completed by the semi-automatic method.Dozens of silver and zinc orebodies are interpreted，the statistical summary of geological characteristics，resource estimation report and drawings of all mineral bodies are automatically completed，and the drawing of 36 geological section profiles，10 horizontal section drawings and 12 vertical longitudinal projection drawings in the mining area are completed automatically within 1/2 days. The geological block method is used to caculate and verify the No.1 main orebody. The relative deviation of the estimation results of the two methods is within a reasonable range. The estimation results show that the results are reliable and meet the specification requirements.The estimation time is greatly reduced，significantly improving the estimation work efficiency and creating good economic benefits.