For a long time, problems such as information lag and cumbersome processes have been widespread under the traditional supply chain management mode. The phenomenon of information silos among enterprises has become the primary obstacle to information connection and efficiency improvement in the supply chain. With the emergence of the digital era, the application of big data, artificial intelligence, the Internet of Things, cloud computing and blockchain technology has successively empowered supply chain management, injecting new vitality into the innovation and efficiency improvement of modern supply chain management models. There are very few studies in the existing literature that examine the employment spillover effects of digital technology application in supply chains. From the perspective of supply chain network construction, This paper intends to explore the impact of supply chain digital technology application on the scale of labor employment of enterprises, and further analysis the impact of the collaborative application of supply chain digital technology of other enterprises in the industrial chain on the scale of labor employment of enterprises in the chain. Compared with the existing literature, the potential contributions of this paper are as follows: Firstly, different from traditional literature that focuses on the analysis of the substitution effect and creation effect of digital transformation on labor employment of enterprises, this paper takes the application of digital technology in supply chain network as an entry point to discuss the spillover effect of supply chain network construction on labor employment of enterprises in the chain. Specifically, this paper clarifies two paths of the employment spillover effect of supply chain digitization from the aspects of commercial credit spillover along the supply chain and smoothing enterprise production, which enriching the existing research on the factors affecting employment in the labor market. Secondly, this paper focuses on the analysis of the synergy between the upstream and downstream of the supply chain network, emphasizing the win-win cooperation of multiple subjects from the perspective of the supply chain, providing theoretical support and empirical evidence for the subsequent promotion and construction of industrial chain digitization. Based on the supply chain research data of listed companies and the perspective of supply and demand network construction, this paper discusses the employment effect of supply chain digitization. The difference-in-differences results show that the enterprise's digitization has a substitution effect on labor employment, while the supply chain digitization within industrial chain can effectively improves the enterprises’ employment scale by smoothing production and reducing the downstream enterprises’ occupation of commercial credit funds, which helps to ease the liquidity constraints of enterprises. In addition, industrial supply chain digitization can effectively cushion the impact of supply chain risks on the labor market, which helps to achieve "the employment-stabilizing". Heterogeneity analysis shows that the employment-stabilizing effect of industrial supply chain digitization is limited by the financing constraints, state-owned enterprises and the enterprises with concentrated purchasing and marketing business show greater spillover effect on employment.The research conclusions of this article are of great significance for the subsequent development of digitized supply chain construction, the maintenance of supply chain security and stability.