Abstract: In order to repair the corrosion defect of the sea riser pipe, the scheme of repair and reinforcement with glass fiber composite materials was made, and the construction technology was introduced in this paper. This construction technology has been used in water injection pipe in Bohai X oilfield. The actual application results show that through repair and reinforcement on corrosion defect of sea riser pipe, the load of the pipeline is shared, the stress and strain of the pipe wall are reduced, and the pressure bearing capacity of the pipeline is partly recovered, which can meet the technological requirements. The method has the advantages of good leak resistance, corrosion resistance, wide application range, long service life and high safety, and all operations do not affect the normal production of the oilfield. Therefore, it has certain popularization and application value.