Under the context of New Engineering Education, practical teaching in electronic and information engineering faces structural challenges including theory-laboratory disconnection, scarcity of industrial-grade resources, and insufficient integration of domestic technology ecosystems. Taking the digital transformation of the textbook Artificial Intelligence Fundamentals and Practical Applications at Harbin Institute of Technology as a case study, this paper proposes a "Knowledge Chain–Tool Chain–Application Chain" three-chain integration design model for practical textbooks, and systematically elaborates its theoretical foundations, design principles, and implementation pathways. Through a quasi-experimental research design, the experimental group (using the three-chain integrated digital textbook) was compared with the control group (using traditional teaching methods). By combining platform log data, project evaluation scores, and questionnaire surveys, the study verifies that the three-chain integrated digital textbook significantly improves students' complex engineering problem-solving abilities, learning engagement, and self-efficacy. The findings demonstrate that the three-chain integration model provides a replicable design framework for the digital transformation of engineering practical textbooks, offering both theoretical and practical reference value for advancing New Engineering education reform.

digital textbooks, three-chain integration, new engineering, practical teaching reform, artificial intelligence education