Abstract: The tidal level observed value not only includes the real tidal level information,simultaneously also possibly contains gross errors and the system errors,which seriously affect the quality of tidal data and its application.In order to dispel the wrong observed value,and obtain the real tidal level information,we propose an integrated detection and repair method,which is based on the tide harmonic analysis and the theory of probability and the mathematical statistic.The experiment according to the long-period tidal gauge collection's tidal level value has very good performance.