Abstract: Selection of locations of the first mining area and open segment ditch，one of the important links in open pit production，plays a significant role in improving the initial economic benefits and connecting the production in subsequent mining areas.However，due to many factors affecting the selection above，it is difficult to draw the optimal conclusion by the single parameter evaluation system.Taking an open pit mine for instance，eight indicators were selected to establish evaluation index system and comprehensive evaluation model was built by adopting TOPSIS.Then，the most reasonable location was determined.The evaluation result showed that compared with the single parameter evaluation system，the evaluation index system by TOPSIS became easier，more scientific and more reliable.The research methods and ideas used in the research have some reference values for determining reasonable locations of the first mining area and open segment ditch in other similar open pit.

Key words: Open pit, First mining area, Open segment ditch, TOPSIS