Abstract: Following the research context of developmental states,this paper takes the development of watermelon industry in L town as an example,and analyzes the logic and mechanism of the evolution of local developmental government behavior.In view of the deficiency that the existing research regards the local developmental government as the rational person who pursues maximum benefit,this paper puts forward a structural explanation perspective of the developmental government behavior.The study finds that before the agricultural taxes and fees were abolished,the government was actively involved in the development of watermelon industry.The government,village collective and farmers formed a closely related interest community,and the government's developmental behavior was embedded in the rural society.After the abolition of agricultural tax,the rural interest community was disintegrated,the macro policy and institutional environment were changed,and the rural grass-roots organization system was loosened.Consequently,this series of structural elements have contributed to the transformation of the role and behavior of local governments in the development of watermelon industry.At present,the local government is promoting a new industrial development policy with agricultural enterprises as the subject,which has put small farmers in a marginalized position;therefore it is not conducive to an organic connection between dispersed small farmers and modern agriculture.How to provide more secure basic public services for scattered small farmers and re-embed industrial development policies into grass-roots society will be the direction for rural revitalization and industrial development policy evolution in the future.

Key words: strong intervention, weak intervention, developmental government, rural revitalization, industrial development