Team creativity has been considered as a critical source for enterprises to gain competitive advantage under the new economic conditions. Studies have found that transformational leadership could promote team creativity, however the specific mechanisms are still not well understood. Based on the review of literature and practical survey, this study constructs a theoretical model which contains transformational leadership, team reflexivity, team boundary management and team creativity. Through the analysis of 128 knowledge team from 30 high-tech enterprises , the results show that transformational leadership has a positive influence on team creativity; team reflexivity and team boundary management play a partial mediative role between transformational leadership and team creativity; team reflexivity has a positive effect on team boundary management. These findings suggest that leaders should create their own transformational leadership style while implementing boundary management and promoting team reflexivity.