Resource-based cities must take the road of green transformation. Green transformation is an economic transformation oriented by ecological priority and green development, the path is a progressive process from traditional development mode to clean, circular and low-carbon development, the key is to choose active transformation in the growth period, and the core is to optimize the development path of resource-based industries in resource-based cities. The linear programming method is used to optimize the development path of resource-based industry in Ordos, a growing resource city. It is concluded that the green transformation of coal industry can not only pursue the project scale and economic growth rate, the development of coal electricity and modern coal chemical industry is the optimal path of green transformation of coal industry, and coal gas and coal oil are the best paths of modern coal chemical industry.