Abstract:Fully implementing the river and lake chief system represents a major decision making deployment by the Party Central Committee from the overall perspective of ecological civilization construction, aiming to tackle complex water related problems and safeguard national water security. As a key area for ecological conservation and high quality development of the Yellow River Basin, Dongping County, Tai'an Municipality, Shandong Province, firmly pursues the strategy of "ecology-oriented and green development". Taking the river and lake chief system as the key starting point, systematic improvement of river and lake ecological environment has been achieved by establishing a sound management system, launching special campaigns, and innovating collaborative improvement modes. This paper systematically sorts out practical measures adopted in Dongping County concerning river and lake chief system construction, special rectification, long term mechanism establishment and ecological industry integration. It further analyzes improvement effects and experience insights, so as to provide referential practical samples for river and lake management in the Yellow River Basin and similar regions nationwide.