For the repair and reinforcement of high piled wharf on a thick soft soil foundation,we analyze the damage detection,wharf structure stress,repair design and construction technology.Adopting the finite element software,the mechanical analysis of bars and the traditional method of low strain test for pile foundation,we obtain the detection range of pile foundation,the stress characteristics and the cause of damage.Using the cast-in-place pier and by the sticking steel reinforcement repair scheme,we carry out the reinforcement of the pile foundation.The conclusion is that through the calculation and analysis of structure’s mechanical characteristics of the damaged high pile wharf and narrow the scope of detection,the traditional low strain detection method can well solve the existing problems of the high pile wharf pile damage detection;making full use of the structural damaged reinforcement repair,we can reduce the investment;using the steel tube technology,we can turn the underwater steel repair of pile foundation to the water dry construction and reduce the construction difficulty.