With the rapid development of the transportation in our country, the span and the scale of bridges break the records continuously. Employees of more talents are required to suit the construction of a series of important engineering. In order to suit the requirement of important engineering, a composite training mode based on postgraduates is established to improve their abilities of the innovation and practical application, analyzing and solving problems, enhancing the quality and the efficiency simultaneously. Important parts are determined by the team leader, and specific research work is guided by the young teachers, fulfilling the directive role of the tutor team. Furthermore, the training mode based on “surface to line to point” focusing on the research method, comprehensive ability, and application innovation, is established, and the training program is specified gradually and adjusted dynamically. The practice shows that the composite training mode based on postgraduates combined with the dynamic training mode based on “surface to line to point” is favorable to improve the postgraduates’ innovation ability, which is more suitable for the requirement of important engineering.