Abstract: 【Purpose/significance】Taking industrial Internet platform as the background, this paper studies the function process of
knowledge reuse among platform subjects, so as to provide a new perspective for promoting enterprise innovation.【Method/process】Based on the knowledge management theory, the knowledge reuse process model based on the industrial Internet platform was con-structed, the knowledge reuse mechanism was clarified, and the guarantee measures of knowledge reuse were put forward.【Result/con-clusion】Knowledge reuse between enterprises based on Industrial Internet platform including four main stages: building knowledge map, knowledge demand retrieval, knowledge trading on platform and user knowledge application, among them knowledge trading is the key stage of the enterprise knowledge transfer on platform, knowledge copy and application is important to realize the enterprise ef-ficiency and innovation.【Innovation/limitation】The paper explored the mechanism of knowledge reuse in the industrial internet plat-form, and enriched the application scenarios of knowledge management theory. However, due to the emphasis on theoretical explora-tion in the construction of mechanism model, empirical quantitative analysis is still insufficient.