In the Yangtze River Delta region，three cities and provinces are connected by mountains and rivers in time and space. In recent years，the ecological green development in the Yangtze River Delta still has some problems：①ecological space protection need to strengthen and ecological space pattern need to optimize，②environmental quality is improving overall but the environmental improvement pressure is still exiting，③environmental co-governance and co-management is enhancing gradually but environmental governance capacity is need to improve. Under the integration background，the Yangtze River ecological green development is also facing some challenge：①the “outline of the regional integration development plan for the Yangtze River Delta” brought up new demands for the co-construction of ecological green Yangtze River Delta，②Tightening resources and environment constraints require accelerating the ecological green development，③Industrial structure and layout couldn’t meet the need of green development，④Energy structure couldn’t meet the need of clean transformation and pollution emission reduction，⑤Ecological environment planning and standards couldn’t meet the need of “three unified”（planning，standards，supervision and law enforcement），⑥Ecological environment integration has become consensus but hard to promote. At last，the report puts forward the following suggestions which including protecting and governing co-environment under three orientations（demands，problems，and effect），strengthening ecological space protection jointly，encouraging innovation driven green development，focusing on the key areas and regions，and building the guarantee system for protecting and governing jointly.