To ensure the stability of the bank slopes of the Pinglu Canal under the influence of long-term immersion and heavy rainfall and other multiple factors,the changes in the stability safety factor of typical slopes on both sides of the canal under the influence of different channel water level and underground water level are analyzed.The results show that as the water level in the canal rises,the stability safety factor of the slope gradually increases,and for slopes with poor geological conditions,the influence of the water level change in the canal is more obvious.When the water level in the canal rises from the normal storage level to the design flood level,with a rise of 7.17 m,the safety factor increases by up to 0.19.As the groundwater level in the slope body rises,the stability safety factor of the slope gradually decreases,approximately in a linear manner.For every 2 m increase in the groundwater level,the safety factor decreases by about 0.03.It is proposed that in channel engineering,for slopes with poor rock properties and small safety factors,engineering measures such as setting up drainage pipes deep into the slope body,setting up water interception ditches and rapid channels on the slope surface should be adopted to enhance the drainage capacity of the slope and reduce the probability of slope instability during heavy rainfall.