In recent years, with the continuous development of knowledge-based economy and the reform deepening of China's power industry, how to attract, retain and develop knowledge-based talent, has become an urgent task in business management of power companies. This paper firstly introduces the background and significance of the topic, then describes the necessities of research on electric power enterprise knowledge workers’ incentive. Secondly, through analyzing the features and demands of knowledge workers, combined with the actual situation of power enterprises, this paper builds the knowledge workers’ incentive mechanism, and establishes the evaluation index system through this mechanism, and then it evaluates knowledge workers’ incentive mechanism of power enterprises by using the fuzzy comprehensive evaluation method. Finally, the paper proves the feasibility and effectiveness by an example, and then knowledge workers’ incentive of electric power enterprise is studied scientifically.