For the purpose of sustainable rural development,the exploration on new rural development theories is of great significance,and the active practices of rural development at present in China actually lay a solid foundation for such theory innovation.As the first one of rural development experiment donated by state-owned enterprises and cooperated by government,local villagers,and education institutions,China Resources Hope Town in Baise deserves its value of discussion in both theoretical and practical explorations.Based on experiences of the rural development experiment of China Resources Hope Town in Baise,this paper constructs the "trinity" theory of rural development that relates to the improvement of built environment,the support of industrial economy,and the reconstruction of social organizations,and related operation mechanism,in order to deal with the new challenges for current rural development and to realize sustainable rural development.In addition,the paper introduces the application process and results of the theory and mechanism in the town.In the end,it reviews the theory and related practice,and discusses the relationship between rural planning and rural development,as well as the duty of rural planners in rural development.