The Pinglu Canal is the backbone project of the western land-sea new corridor,and it is also the first grand canal built to connect the river and sea since the founding of new China.Its navigation flood control is of great significance.This paper establishes a two-dimensional hydrodynamic mathematical model of the Pinglu Canal's river structures,simulating the water flow patterns and hydrodynamic axis situation of the canal's navigation channel under flood control standard conditions.The results show that the water flow patterns and hydrodynamic axis of the Pinglu Canal navigation channel after dredging and construction are more conducive to the discharge of floodwaters and the long-term stable operation of the canal.The research results can provide reference for the planning and management of the Pinglu Canal.