Study on tourism ecological security is of great significance for tourism destination to the coordination of ecological environment protection and tourism development. Based on tourism ecological security data of Zhangjiajie from 2001 to 2014, the tourism ecological safety evaluation index system of “TQR” was constructed from 3 aspects, which were threaten, quality and regulation. Then, by using the grey relation projection method and obstacle degree model, the ecological security status and main obstacle factors were analyzed. Results indicated that: In 2001-2014, the tourism ecological security grey related projection value kept the rise trend although there was some volatility, and the security situation was in the “general” level except in 2003. In terms of each subsystem, in 2001-2014, the ecological security situation of threaten system drop from “general” level to “relatively unsafe” level, the ecological security situation of quality system was in “relatively safe” level except in 2003, the ecological security situation of regulation system raised from “less safety” level to “safer” level. In 2001-2014, the main obstacle factors that influencing the tourism ecological security of Zhangjiajie had some changes. In early times, the main obstacle factors were ecological land be occupied, sewage treatment level was low, and the quality of practitioners was not high. In recent years, factors as visitor density control, tourism resource utilization intensity control, ecological land protection and pollution reduction were facing a growing press.

Key words：tourism ecological security; evaluation; grey relation projection method; obstacle factors; Zhangjiajie