In recent years, e-maintenance provides the opportunity for a new maintenance generation. Knowledge is one of core e-maintenance resources. To improve the efficiency of knowledge management and so as to improve the quality of e-maintenance work, a knowledge integration model for e-maintenance was proposed. The proposed model was made up of the relationships among role knowledge, task knowledge and equipment knowledge, to achieve the integration of maintenance business and knowledge resources. This study involved the following tasks: (1) developed the key components of the proposed model, including e-maintenance federation ontology, e-maintenance knowledge space and knowledge integration network; (2) designed the construction procedures for the proposed model; (3) presented an example to illustrate the application of the proposed model. Results of this study can improve the level of knowledge management for e-maintenance.