Porphyry iron deposit is a typical type deposit on Yangtze River area. The complex ore body shape and different size on spatial characteristics bring some difficulties to reserves estimation. In the processes of porphyry iron deposit’s reserve estimation on Yangtze River area, this study focus on combination of advanced 3-D geological mining software and traditional geological research methods, which include: (1) Collecting ore deposit geology comprehensive information, (2) establishing 3-D model of ore body, vein rock and bastard, etc, (3) , 3-D solid mine reserves estimation by establishing block constraint model based on traditional reliability standard classification as well as Chinese national standards. This study develops the methods of interpretation in 3-D space, determination of the searching ellipsoid parameters, the reliability standard classification of resources/reserves, and reserves estimation. We also compares and analyzes the results of traditional reliability standard classification and provided by Surpac, which proves this method of reserves estimation absolutely qualified for the relevant standards and can be served for the submission of geological exploration report. The results have important practical significance and popularization value which makes calculation of solid mineral resource reserves more rapid and accurate.