Describes the current situation of the bridge, points out the reasons of bridge reinforcement, become problems must be solved, along with our country economy and social development of transportation, built in the past in town and all levels of highway Bridges, the traffic is very heavy burden and heavy traffic load.Owing to historical reasons, such as shortage of funds, the bridge was designed load and discharge standard, technical force, the lack of design, construction management, design, construction technology extensive low level and equipment, means, materials, design behind more or less thoughtle-ss faults, construction and different sizes of the defect. According to recent large bridge overloading transportation Bridges and strengthening practice, highway bridge each part of the reinforcement method, and the management of the bridge are proposed. In order to promote the bridge reinforcement technology constantly maturity and perfection.Introduces the new bridge reinforcement method of practical and puts forward the corresponding technical points:Carbon fiber composite materials is a new type of material, can replace the steel used in bridge reinforcement project, so the extensive attention by people. This kind of material in Japan, the most widely used.Carbon fiber with traditional enlarging concrete section or steel concrete reinforcing, save a space, the construction is simple, no need to fixed facilities, the construction quality assurance, basic structure, size and weight did not increase, corrosion resistance, good durability etc. In addition, using this method can greatly improve the service life, reduce the building cost of reinforcement. Therefore, carbon fiber as a landmark of bridge reinforcement materials, and is favored and attention.Externally prestressed concrete is set in the external prestressed concrete prestress to pressure. External prestressed concrete also called unbonded prestressed concrete, is a kind of prestressed concrete directly set in vitro, or set in body prestressed concrete, but no peek-hole grouting binderless prestressed concrete. It with prestressed concrete difference prestressed concrete with unbonded sex. Since the 1980s, unbonded prestressed concrete buildings in China widely used, then gradually applied in the bridge structure.Because of externally prestressed technique is reliable and convenient construction, economy (beam) prestressed individually anticorrosive can even change etc, in recent years, has been widely applied in the bridge reinforcement engineering. Many of the engineering practice shows that the application of prestressed reinforced bridge, can significantly improve the bearing capacity and structure LieDu resistance, effectively improve the structure of the stress state.