本文主要通过分析准公共物品在社会中的必要性,并且着重通过数理模型分析为什么准公共物品可以促进社会分配更加公平,通过模型退出当准公共物品领域国有经济较多时,社会中的富人阶层消失,贫富差距缩小。最终得出结论,当政府对准公共物品的控制增强时,即国有经济占有较大比重时,可以使社会公平得到更好地实现。 This paper mainly analyzes the necessity of quasi-public goods in the society, and emphatically analyzes why the quasi-public goods can promote the fair distribution of the society through the mathematical model and exits through the model when the state-owned economy is more prospective in the field of public goods, the rich people in the society Disappear, narrowing the gap between rich and poor. At last, it concludes that when the government controls the public goods more effectively, that is, when the state-owned economy occupies a larger proportion, the social equity can be better realized.