Abstract:Social Harmony Equation(SHE) leads the social system to the evolution direction of social entropy increase by accumulation of "social combustion substances",i.e.,the accumulation of microcosmic "basic particles"(individual) in social system from assimilated "basic social energy" to dissimilated one;meanwhile,the catalysis of "social combustion promoter"(social excitation energy) has enhanced the "social temperature" of disordering process of social system and completed the energy accumulation of social entropy increase that can generate the transition.Finally,ignited by the "social trigger threshold",the social system has completed the abrupt change from orderliness to disorderliness.The continuous variation of the above-mentioned three basic non-linear processes has jointly composed the whole contents of social combustion theory.Under the restriction of such conditions of different time(t),different space(α) and different scale(β),it is finally explained as a comprehensive dynamics of social system deterioration.