Abstract: In this paper, we analyzed the instantaneous errors of attitude in multibeam survey in detail. According to different sources, we use corresponding algorithms to correct induced depth errors. At first, we need to remove the influence of terrain trend. Then the linear relation of depth errors and roll rate or roll can be used to infer whether the errors are induced by time delay or attitude scale. Once the sources of attitude are known, the parameters of biases can be obtained by adjusting until disappearance of the linear relations. Finally, the induced depth errors will be corrected by the parameters. The method is verified by the real data. It can provide a reference for improving multibeam bathymetry, especially in shallow water.