Abstract: The stability of the supply chain plays an important role in its international competitiveness When the internal uncertainty of the supply chain increases or the external shock affects the node enterprises in the supply chain，if there is no sufficient information shared in the supply chain，the entire supply chain will fall into a stagnation state of low efficiency The development of the digital economy drives the digital technology to be applied in supply chains By embedding digital platforms into the supply chain，transaction information can be identifiable，helping node enterprises to cope with the uncertainty in the complex environment and thereby enhancing the overall competitiveness of the supply chain
This article attempts to construct a theoretical model to analyze the competitive effect of the digital platform embedded in domestic supply chains，and examine the impact of digitalization and platformization of domestic supply chains in terms of competitiveness and welfare in the situation of international competition Results show that the embedding of the digital platform has dual impacts on the domestic supply chain On one hand，the integration of the digital platform helps to improve the transaction efficiency between the node enterprises in the domestic supply chain，which strengthens the overall competitiveness of the domestic supply chain，and thus improves the social welfare On the other hand，the node enterprises in the domestic supply chain may be technologically dependent on the digital platform，thus the platform has incentives to abuse its dominant market position，weakening the competitiveness of the domestic supply chain relative to its foreign counterpart
Based on the research results，this article proposes the following implications for the digitalization and platformization of domestic supply chains in China
First，we should strengthen the technological interface and spillover of deep integration between digital platforms and supply chains，and improve the transaction efficiency of supply chains driven by digitalization with high quality It is necessary to promote the digital transformation of the node enterprises in supply chains，with the help of the synergy from digital information，the network effect formed by digital platforms could be strengthened within the supply chain，increasing the joint profit of the digital platform and supply chain，which strengthens the motivation of their integration
Second，we should cultivate a competitive environment in the market of digital platforms and prevent the social welfare in the supply chain transaction from being excessively extracted by the digital platform Effective competition policies can stimulate competitiveness in the market of digital platforms，and alleviate the problem of uneven or unreasonable distribution of welfare in the transactions of supply chain
Third，we should promote the deep integration of the digital economy and the real economy from the perspective of the supply chain The improvement of international competitiveness of the supply chain includes the digitalization and platformization of the supply chain More importantly，it is necessary to achieve a deep and highquality integration of the digital economy and the real economy in terms of the supply chain system On one hand，digital technology can effectively overflow into supply chain transactions；on the other hand，international competitiveness can be strengthened through the technological enhancement of the supply chain

Key words: digital platform, information quality, supply chain competitiveness, government regulation

摘要： 在国际经济环境快速变化的影响下，国际竞争逐渐向供应链竞争转移。数字经济的跨越式发展使各国努力将数字技术运用于供应链的生产、物流、消费等环节，以提高本国供应链的国际竞争力。本文关注了在国内外供应链竞争的环境下，本国供应链的数字化和平台化应用对其竞争力和福利效果的影响。研究发现，当数字平台嵌入本国供应链时，数字平台所构建的网络空间能够降低节点企业搜寻交易相对人的成本、提高交易概率，进而降低供应链“断链”风险。但同时，供应链对数字平台的技术性依赖可能会转化为数字平台的市场支配地位，若数字平台为了追求自身利润的最大化而对供应链节点企业制定过高的接入价格，则有可能再次引发本国供应链竞争力弱化的问题。因此，政府可通过构建和培育可竞争的数字平台市场，防范数字平台嵌入供应链后挤占供应链价值的风险，以维护和提高本国供应链在数字化和平台化转型过程中的竞争力。

关键词: 数字平台, 信息质量, 供应链竞争力, 政府规制