[Objective] The ecosystem sustainability of the Chan-Ba Ecological District of Xi'an City was evaluated to provide theoretical support for the ecological system from the aspects of health and sustainable development.[Methods] Based on energy theory, the author selected the corresponding indicators from two aspects of social economy and ecological environment, to compare and study the developments in three important stages of 2004, 2009 and 2014, in Chan-Ba Ecological District.[Results] The ecological sustainabilities of Chan-Ba Ecological District in Xi'an City dropped from 0.003 4 to 0.002 4 from 2004 to 2009, but increased to 0.005 1 in 2014. The overall sustainability of the study area showed an increase trend. The sustainability of the study area is analyzed from the view of energy enrichment. The energy indexes of enrichment(EIE) in 2004, 2009 and 2014 were 0.82, 0.82 and 0.59, respectively. The study area was a highly enriched area.[Conclusion] Because the Chan-Ba Ecological District in Xi'an City is a highly developed consumer-oriented economy with its small area, scarce natural resources and over-reliance on external energy, which lead to its low sustainable development ability. The emergy sustainability index(ESI) indicated that the sustainability of Chan-Ba Ecological District was improved. The Chan-Ba Ecological District is a highly energy-intensive area. The continued high enrichment of energy wealth of Chan-Ba Ecological District is of great importance to its rapid development.