Abstract: In this study, the current technical guidelines for animal carrying capacity calculation methods were evaluated through field analysis of animal carrying capacity. Some of technical parameters in the technical guidelines were evaluated on their suitability and necessity in the estimation procedure. It was considered that the current method was out of date in the approach of selecting parameters as the mode and methods of animal production have been changed dramatically. Some parameters were obviously unnecessary and should be disregarded or modified in accordance with animal production system in grassland regions practically.