Abstract: Mining software Surpac that has spatial positioning and analysis functions was used in the comparison of the stripping ratios of six open-pit mining plans based on deposit model evaluation, current surface modeling and open-pit design modeling.It is concluded that the stripping ratio is the least when the lowest mining level is 880 m in the open-pit mining design of Manjiazhai Sn-Zn polymetallic deposit.

Key words: Surpac software, Deposit model, Open pit mining, Stripping ratio, Optimization