Abstract: Common in the inherently curved river channel, the bridge pier built toward the construction will alter the trend of the water flow movement downstream and negatively impact the stability of the embankment. The hydropower model in the Mike Zero series software is used to numerically simulate the conditions of various construction locations for the cylindrical bridge pier and the pier and the river channel in order to investigate the effects of diagonal bridge pier in the continuous curve, and analyze the impact of bridge piers on water level and flow velocity under various operating conditions. Research indicates when a bridge pier with different oblique angles at different positions in the corner, the height of the maximum water in front of each pier is increasing at the bridge pier diagonal cross-intersecting angle α ranging from 30° to 60°. Additionally, the offset of the oblique pier increases the plane flow velocity of each operating state, and the flow velocity around the bridge pier increases with the size of the bridge pier’s cross section. After the construction of a pier in the central area of the bridge pier, both the horizontal and vertical flow velocities along the longitudinal side of the pier decrease. The decrease in flow rate with the increase in the angle of the bridge pier becomes more evident. However, it is worth mentioning that the horizontal longitudinal rate at the back of the cornering coast and the back of the bumpy area increases to varying degrees, and it consistently remains higher than the flow rate prior to the construction of the pier. The influence of the water flow between adjacent curves has a reverse suppression effect on the development of the lateral circulation structure of the front curve. When the bridge connection section is built in the corner connection section, the loop of the back surface of the pier is smaller than the circulation of the bridge pier in the curve section. These findings have a basis for the design of the river bridge and shore protection engineering.