Aiming at the characteristics of naval power engineering students in military academies who have a relatively weak theoretical foundation but focus on skill development, this study integrates the essential fundamental theoretical knowledge of engineering thermodynamics and heat transfer with the corresponding professional knowledge of diesel engines. It quantifies their correlation through SPSS data analysis and proposes a teaching model “guided by fault phenomena and maintenance cases, supported by visualization and simulation.” The article elaborates on the knowledge point connection method based on data analysis, including descriptive statistics, correlation analysis, and regression modeling, and applies it in combination with the trinity teaching process of “case guidance, project assessment, and practical operation reinforcement.” The results show that this integrated method can effectively reduce the difficulty of theoretical learning, stimulate students’ interest, enhance fault diagnosis and practical abilities, and provide data support and an effective path for cultivating high-quality technical and skilled marine power engineering talents.