Abstract: iprap protection of bank was applied in the middle and lower Yangtze River and many other rivers at home and abroad. The experiments on many riprap protection schemes of different diameters were carried out. The test results are summarized as follows: It could better adapt change of river bed. The less the diameter of block stone is, the stronger the ability adapting change of river bed is. Effect of riprap protection is related to the diameter, percentage of coverage and cubic meter quantity of block stones. During the process of revetment construction, it has a uniform distribution on bank slope at the place of high water depth and big velocity.