In the era of the digital economy, with the digital and intelligent transformation of the industry, technical complexity, and higher demand for the inter-operability of Industrial Internet platforms, standardization work faces challenges of timeliness and high quality. So, enterprises must improve the quality and efficiency of their digital innovation capabilities in the dynamic process of Industrial Internet standardization. Given this condition, based on the digital innovation theory, standardization theory, and social network theory, this paper takes 387 A-share-listed enterprises in the field of Industrial Internet industry as the research object and uses the secondhand cross-sectional data to carry out the research on the influence mechanism of enterprise Industrial Internet standardization on the digital innovation capabilities of enterprises. The results show that: enterprise Industrial Internet standardization exerts a positive influence on the digital innovation capability of enterprises; a standard alliance network in the enterprise Industrial Internet standardization plays an intermediary role in the digital innovation capability of enterprises; and the scale of enterprises has a positive moderating effect on the intermediary role of a standard alliance network between the enterprise Industrial Internet standardization and the digital innovation capability of enterprises. From the perspective of the alliance network effect, the research explores the economic consequences of standardization construction and enriches the appraisal of the standardization capability of enterprises for the purpose of providing targeted empirical evidence and practical strategies for the standard-based digital innovation of Industrial Internet enterprises.