Abstract: 【 Purpose/significance】 Exploring the factors affecting the effectiveness of interdisciplinary knowledge integration in college students' innovation teams can help improve the knowledge communication effectiveness and promote the successful implementation of innovation projects.【 Method/process】 This study conducted one-on-one in-depth interviews with members of college students' in⁃ novation teams, and analyzed interview data using a three-level coding process based on grounded theory. Guided by social capital theory, it developed a model of influencing factors of interdisciplinary knowledge integration effect of college students' innovation teams, including structural dimension, relational dimension, cognitive dimension and knowledge dimension. Furthermore, it analyzes the influencing factors and functional relationships. 【Result/conclusion】 The structural dimension includes organizational structure, connection rules, and communication methods, playing a structural supporting role; the relationship dimension includes trust and team atmosphere, playing a role in maintaining relationships; the cognitive dimension includes goal convergence and common language, playing a cognitive driving role; the knowledge dimension includes knowledge heterogeneity, knowledge matching, and knowledge inte⁃ gration strategies, playing a knowledge synergistic role. 【Innovation/limitation】 The study revealed the influencing factors and path⁃ ways of interdisciplinary knowledge integration in university innovation teams. The sample size needs to be enriched, and further vali⁃ dation can be achieved through quantitative research.