新古典经济学规模经济概念的缺陷是没有把空间因素和外部性考虑进去,导致理论和实践上的偏颇,政策层面上表现为忽视中小企业的作用和发展。规模经济有企业内部规模经济和外部集群规模经济的区别,中小企业也具有规模经济。结合深圳实际提出中小企业实现规模经济的几个选择,并从政府层面提出促进中小企业集群发展的建议 The shortcoming of the concept of economies of scale in the neoclassical economics is that it does not take space and externalities into account, resulting in both theoretical and practical biases. The policy level shows neglect of the role and development of SMEs. Economies of scale have the difference between internal economies of scale and economies of scale of external clusters. Small and medium-sized enterprises also have economies of scale. Based on the actual situation in Shenzhen, several options for SMEs to achieve economies of scale are proposed, and proposals for promoting the development of SMEs clusters are put forward at the government level