Geostatistics is a very onventional approach of geological studies and reserves calculation at present,and Surpac software make the grade estimation and reserves calculation of mineral deposit by geostatistics become more simple and intuitive.The three-dimensional ore body model and geologic database of a lead-zinc deposit were established.According to geostatistics,the combinatorial analysis on the data of borehole samples was made.On the basis of the fitting and cross-validation of experimental variograms,a reasonable variogram model was established.A the block model of the ore body was established,and the grade of lead and zinc of the mineral deposit were estimated by ordinary Kriging,the average grade and reserves were calculated according to metal elements and sub-level respectively,and the results were compared with that calculated by the mine.The result of comparison showed that the three-dimensional model established for the mineral deposit and the calculation results are reliable and useful to the reserves estimation mining plan making and so on for the mine.