Abstract: For the selection of ventilation and cooling scheme in deep well，the surface climate has a decisive role.Based on three-dimensional ventilation simulation software Ventsim，and aimed at the main factors of the air temperature，the cooling wind speed，the artificial cooling capacity and so on，the simulation of ventilation and temperature reduction is carried out for Dataigou Iron Mine.Finally，the optimum scheme of ventilation and cooling in the year is obtained，which provides a scientific basis for the selection of the cooling process and the cooling scheme of mine ventilation.In the process of deep well mining，artificial refrigeration has a pivotal influence on the safety production and economic benefit of the mine.

Key words: Deep mining, Heat harm, Ventilation cooling, Refrigerating capacity