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In recent years， several Bogus schemes have been put forward to improve the initial thermodynamic and circumfluent structures of typhoons， which performed well in typhoon numerical forecasting. It has great significance for typhoon numerical simulation and forecasting to understand， compare， and improve various Bogus techniques. An introduction is made to four initialization schemes of typhoons， which include the Bogus data assimilation scheme （BDA）based on four dimensional variational data assimilation (4DVAR)， the incidental Bogus scheme of MM5， the Bogus scheme advanced by Wang Guomin， and one used by the Institute of Tropical and Marine Meteorology in Guangzhou， and then the effects of these models in typhoon numerical forecasting are compared. The results show that the BDA scheme is obviously better for improving both typhoon track and intensity simulations.