The key to successful technology innovation lies in the combination of tacit and explicit knowledge. Data, information and tacit knowledge are regarded as the three hierarchies of knowledge. This paper analyzes two types and three hierarchies of knowledge in enterprises' technology innovation and it thinks the management of knowledge hierarchies should be strengthened in technology innovation. Proposes to do well in classifying, rating and cross statistic analyzing of data, meanwhile probes into the method of information management according to three goals of information management in enterprises. technology innovation, finally analyzes the main factors of tacit knowledge management and discusses the process of tacit knowledge management from the aspects of the production of tacit knowledge; the activation and codification of tacit knowledge; the transfer and cooperation of tacit knowledge and the protection of tacit knowledge, so as to promote knowledge resource organized and utilized much better in enterprises, and ensure the technology innovation to have a smooth process.