This　article　took　11　provincial　capital　cities　in　the　west　from　2005　to　2018　as　the　evaluation　objects,　used　the　entropy　method　to　evaluate　the　level　of　new　urbanization　and　ecological　civilization,　and　used　the　coupling　coordination　degree　model　and　relative　development　degree　model　to　explore　their　coordinated　development　and　lag　status,　providing　theoretical　support　for　further　promoting　the　coordinated　development　of　the　two.　Results　show　that:　(1)　the　new　urbanization　construction　of　provincial　capital　cities　in　western　China　is　in　the　exploratory　stage,　and　the　characteristics　of　rising　fluctuation　and　space-time　differentiation　are　particularly　obvious.　The　scores　of　cities　in　southwest　China　are　generally　higher　than　those　in　northwest　China　and　the　middle　reaches　of　the　Yellow　River;　(2)　There　is　a　big　gap　in　the　level　of　ecological　civilization　construction　in　provincial　capitals,　which　basically　develops　in　a　fluctuating　manner.　There　is　a　big　gap　in　the　level　of　ecological　civilization　construction　among　different　regions,　and　the　development　level　and　development　law　of　neighboring　cities　are　close　to　each　other;　(3)　There　is　a　close　coupling　relationship　between　new　urbanization　and　ecological　civilization　at　a　high　level,　but　the　coordinated　development　generally　fails　to　achieve　good　or　high-quality　coordination　of　mutual　promotion;　There　is　an　alternating　lag　between　the　new　urbanization　and　ecological　civilization　in　most　cities,　and　the　lag　tends　to　continue　and　intensify.　In　the　future,　we　should　focus　on　guiding　the　development　of　cities　with　relatively　weak　development　foundation,　narrow　the　differences　between　regions,　and　strengthen　the　coordinated　construction　of　new　urbanization　and　ecological　civilization　from　the　perspective　of　strategic　goal　orientation.　©　2019　Institute　of　Geological　Sciences　of　the　National　Academy　of　Sciences　of　Ukraine