Starting from the logical starting point of the special system change of military logistics socialization, this paper analyzes the cost characteristics of the existing plan security system of the Chinese army, that is, the expansion of the ineffective transaction costs and the low efficiency of the organization, With a serious cost constraint system. Through the analysis of the model of logistics management and the organization of the logistics system, the author analyzes the organizational cost comparison of the two logistic support systems, and thinks that the essence of the institutional change of the social logistics system of the army is the process of the conversion of the system cost to the market transaction cost, The process of internalizing the cost.