The essence and dregs coexist in customary law of ethnic minorities, which has the dual characteristics of four aspects. First, the diversity of ethnic groups and the non - systematization of the form and content coexist. Second, the democratic culture factor and strict identity difference coexist. Third, the goal of individual freedom and harmony is coexistent with strong familism. Fourth, the spirit of wisdom of tolerance and compromise coexists with revenge fights. At present, the state law and the ethnic minority customary law have fallen into interlacing. The customary law also has local distortion under the radiation of the state law. The fracture of customary law aggravates the disorder of the rule of law caused by the phenomenon of anomie in ethnic areas. The construction of the rule of law in minority areas requires patience, confidence and love.