The river embankments preserved in the lower reaches of the urban section of the Pinglu Canal have the characteristics of small cross-section and light mass of protection blocks.After the canal is navigable,under the frequent action of ship waves,it may have a certain impact on slope stability.To analyze the safety and stability of existing protection blocks under the action of ship waves,we build a typical river channel and ship model using 3D graphics software,calculate the slope toe wave height values generated by ship waves under different ship speed conditions through numerical simulation,and determine the corresponding stable mass of blocks.The results show that under the design high water level conditions,when the speed of the 5 000 DWT bulk cargo ship is 3 m/s,the generated ship waves can cause instability and detachment of the poorly embedded armor blocks.It is recommended that the navigable ship speed in this section should not exceed 4m/s.