The revetment project is widely used to resist the erosion of water flow and maintain the stability of the bank in the channel regulation project.It is usually arranged in the bank slope which is prone to collapse so it is vulnerable to water erosion，which is affecting its normal function.In this paper，the measured data are used to analyze the damage of Caijiadu revetment in Xinzhou—Jiujiang reach of the middle reach of the Yangtze River.The results show that the head of Caijiadu underwater revetment is seriously damaged，and the collapse nest on the upstream side becomes larger.The main reasons for the damage are the water flow attaching to the bank and swinging of the major stream channel.On this basis，the necessity of maintenance is analyzed，and the maintenance method of “repairing slope+stabilizing toe” is proposed，which can provide reference for similar revetment in the middle and lower reaches of the Yangtze River.