The beam height of high piling quays is large,controlled by pile foundation spacing,and the span diameter is relatively small,that is,the ratio between span and height is relatively small.Strictly speaking,it is a deep flexural member restricted by the specification.However,in practice,the common situation is that the deep flexural member is approximately reinforced according to the normal bending member.On the basis of the current specification,through an engineering example of the two kinds of reinforcement ways after analyzing ,the result is obtained:under the same situation,the calculation amount of reinforcement for deep flexural memb er increases by 30%~35% compared with that of ordinary bending components;for beams or other similar deep flexural member of high-pile beam and slab wharf,if the reinforcement is carried out according to normal bending components,the result is unsafe.The conclusion can be reference for future reinforcement design of port and waterway engineering works.