In order to conduct the large-scale mining of copper mineral resources so that the requirements of national industrial construction were met, the division of mine field in Shizishan mining district was done This Work is a very difficult system engineering which is involved with mining scale,occurrence depth, exploration with mining scale, oc-currence depth, exploration extent and mineral separability etc of ore deposits which are scattered and have a system of their own. The author describes the principles if mine field division, divides in detail Shizishan mining district in principle, puts forward three Kinds of division plan and compares their advantages and disadvantages, and selects the optimal mining plan which this mining district is divided into one mine field