The cities at all levels in Sichuan put “ecological priority，green development” concept and experience system into a new round of opening-up and cooperation，strongly promote the environmental field of open cooperation in depth and the sustainable development of urban environment. In terms of resource utilization，Sichuan Cities are moving towards joint-construction and sharing through opening-up and internal cooperation. In the aspect of ecological improvement，Sichuan cities actively build carbon trading market through Joint Meeting system，strategic cooperation Agreement and cooperation in project development，and promote the construction of regional ecological civilization together. The urban green competition aspect，each city makes its focal points of environment sustainable more clear，the characteristic more obvious，and the division of division further deepening. We propose to promote green opening-up and cooperation comprehensively，strengthen the synergy between “The Belt and Road” and the new urbanization，strengthen the construction of green infrastructure，promote the development of green investment，green trade and green financial system，realize the rise of the city green value chain in the opening，and perfect the system construction in the fields of green Government，enterprise environmental responsibility，Public participation，promote the development of urban sharing economy and the sharing cities.