Using data from Chinese listed manufacturing firms, this paper examines the impact of digital technology transaction networks and total factor productivity (TFP). The results reveal that the high degree of embeddedness in digital technology transaction networks significantly enhances the TFP level of manufacturing enterprises. The mechanisms include the innovation capability growth mechanism, the competitiveness enhancement mechanism, and the information alignment mechanism. Additionally, high financing constraints strengthen the TFP-enhancing effect of digital technology transaction networks. Heterogeneity analysis indicates that the positive impact of digital technology transaction networks on TFP is more pronounced for manufacturing enterprises that are technology suppliers, operate in regions with higher intellectual property protection levels, and adopt defensive strategies. The findings provide practical guidance for leveraging cross-boundary flows of digital technology to empower high-quality development in manufacturing.