Abstract: The paper introduces the investigation result and repairing method of the ageing and disease of more than 130 culvert gates on the river courses in Beijing. The investigation indicates that the greatest menace to the reinforced concrete of these culvert gates is the peeling of the component surface and the rusting of reinforcing bar caused by carbonizationof the concretes, the area needed to be repaired rapidly is 40% of the survey area. The mending process on carbonated concrete of 17 culvert gates is also presented by using compensating systolic mortar and epoxy coating Hz902.