At present, low passion for work is a difficult problem in human resource management. This paper breaks the research inertia of scholars in dissecting the relationship between fit and passion for work from the perspective of multiple conflicts, and explores the relationship between person-environment fit and the influence of different fit on passion for work. Through the investigation of 402 university graduates of different levels, the results show that: person-organizational fit, person-job fit, person-leader fit and harmonious work passion, obsessive work passion are positively correlated. The results of this paper provide a new explanation for the generation of work enthusiasm and provide practical guidance for solving the management problem of low work enthusiasm.