Abstract: The only way to give full play to the advantages of Chinas ultralarge market is to speed up the construction of a unified national market and promote the formation of a domestic largescale cycle with complementary supply and demand， common progress in production and sales， and smooth and efficient operation. According to Marxist circulation theory， commodity circulation and market development are mutually reinforcing， while the unified big market is the product of the markets advanced stage. How to fully understand and grasp the content and characteristics of the unified big market needs to start from the Marxist circulation theory and clarify the related individual relations， in order to promote the construction of a unified big market across the country. The construction of a national unified large market is facing problems such as lagging market system and facilities construction， market segmentation of commodity elements， and blurred boundary between government and market functions， which need to be solved by changing government functions， adjusting industrial policies， coordinating urban and rural regional development and strengthening infrastructure construction.

Key words: economic cycle; Marxist circulation theory; market segmentation; unified national market

摘要： 加快建设全国统一大市场，推动形成供需互补、产销共进、畅通高效的国内大循环，是充分发挥我国超大规模市场优势的必由之路。根据马克思主义流通理论，商品流通与市场发展相辅相成，而统一大市场是市场发展到高级阶段的产物。如何全面认识和把握统一大市场的内容和特质，需要从马克思主义流通理论出发，廓清与之相关的个别关系，以期推动建设全国统一大市场。建设全国统一大市场面临市场制度和设施建设滞后、商品要素市场分割、政府和市场职能边界模糊等问题，需要通过转变政府职能、调整产业政策、协调城乡区域发展和加强基础设施建设等方面予以解决。

关键词: 经济循环；马克思主义流通理论；市场分割；全国统一大市场