The condition of environmental sustainable development of energy resource and chemical base in Northern Shaanxi was studied scientifically and rationally. The trend of environmental development in Yulin was analyzed by system dynamics. The result shows that air quality has been improved, but industrial waste water and industrial solid waste is polluted seriously in this region.  According to these cases, some suggestions are given to decrease environmental pollution, which are improving the handling capacity of pollution, reducing the pollutant emission, increasing environmental protection investment, fulfilling responsibility of ecological environment management to all enterprises as well as strengthening supervision of environmental protection, etc.