关键词：大气；生态环境；大气污染
摘 要：Transport development bring a negative impact on human survival ecological environment, such as destruction of vegetation, air pollution, soil erosion and other environmental issues.The actuality proves that the use of tunnel development of underground space can improve traffic quality, while also protecting the environment.Therefore, tunnel engineering and utilization of undergrotmd space are to protect the ecological environment to be effective ways for realizing economic sustainable development of economy.In this paper, based on the practical application at home and abroad, for the big cities, mountain areas, river waters, the suitability evaluation and beneficial discussion about the transportation by using tunnel to protect the ecological environment are of great practical significance to protect and improve the ecological environment.