Abstract: Coal mining isoline map is commonly used in the coal resources exploitation.Traditional manual plotting is not only slow-rate and inefficient,but also quality-unguaranteed.The software-Surfer 8 can be used to select suitable interpolation method firstly to grid the separated data related to coal-mining,and then draw isoline,which can ensure the isoline mapping precision as well as efficiency and provide basis for management and guidance for mine production.