This paper has analyzed the advantages of the online and offline mixed hybrid teaching mode in its teaching. According to the current teaching situation of ship fluid mechanics, through the exploration of online and offline teaching mode in the teaching of ship fluid mechanics, this paper has discussed the application methods of online and offline mixed teaching mode in the course of ship fluid mechanics, including teaching content design, teaching method design and teaching evaluation design Aspects of the method. Through the preliminary application, some implementation effects have been achieved and the teaching quality has been improved to a certain extent.