The existing research mainly researched the way to handle the idle farmland in terms of policies and laws, but ignored the importance of empirical research. Empirical research indicates that some villages handled the idle farmland by mutual-help among villagers. Researching on the mutual-help among people in G village who went through three evolutions, i.e., from economy- dominated relationship to paternal line-dominated relationship and then to neighborhood-dominated relationship, found that the current pattern of its mutual-help is neighborho...