The work aims to take rural public environmental facilities as the research object and explore their design paths and methods under the concept of "triple sustainability" to improve the level of rural construction and achieve the sustainable development of rural public environment. First, the existing dilemmas and sustainable development opportunities of China's rural public environmental facilities were sorted out and summarized. It was found that the concept of "triple sustainability" was the key to promoting the design and upgrading of rural public environmental facilities. Secondly, combined with excellent cases at home and abroad, the specific design paths and strategies of three types of rural public environmental facilities system, namely rest, sanitation and recreation, under the concept of "triple sustainability" were analyzed, and different design methods were extracted. In conclusion, the sustainable development of rural public environmental facilities design needs to take into account the three dimensions of environment, economy and society. Combined with the concept of "triple sustainability", the rural landscape reproduction method for environmental sustainability, the rural product regeneration method for economic sustainability, and the rural cultural revitalization method for social sustainability are obtained. These design methods can effectively alleviate the current design dilemma of rural public environmental facilities, improve their sustainable design quality, and add impetus to the comprehensive construction of rural revitalization.