Abstract: When applying a low strain reflected wave method to the high-pile wharf in service life, two platforms are cut in the pile in order to set up the sensor and excitation, thus a certain damage to the pile can be created. Based on a finite element software ANSYS, this paper compares the stress change of piles with different inclination when piles are in good conditions and detecting conditions. It also makes analyses of the degree of stress concentration in the cut side. Analysis results show that the pile cutting damage can lead to the stress concentration at the cutoff, and the impact range of cutting is mainly close to the cutting of 1.0 m. The most disadvantaged section of the pile moves from the connection of the pile with the beam at the top of the pile to the cut platform. The stress concentration is related to the pile inclination. The highest stress concentration occurs in the battered pile, then the vertical pile, and finally the backslash pile. Therefore in the case of the high-pile wharf where the impact force given by ships is taken as a control load, the proportion of backslash piles to be detected can be increased under the conditions of the low strain detection. The range of 1.0 m to the cutting damage should be repaired in order to ensure the horizotal bearing capacity of the piles foundation. The research results can be taken as a reference for detection of the piles in high-pile wharfs.