The invention discloses a multi-functional marine HUD system. The multi-functional marine HUD system comprises a sensor system, a serial port, a display processor, a character generator, a CRT module,an optical module and a micro processor, wherein the sensor system is used for collecting all kinds of navigational parameter information; the serial port is connected with the sensor system througha transmission line; the display processor is connected with the serial port and used for editing and processing the incoming navigational parameter information into control code information and marine clock information; the character generator is connected with the display processor, and used for converting the incoming control code information into CRT electronic gun deflection information; theCRT module is connected with the character generator and used for receiving and converting the CRT electronic gun deflection information into image information; the optical module is used for receiving the image information of the CRT module; one end of the micro processor is connected with the display processor, and the micro processor is used for converting the incoming marine clock informationinto control information; the other end of the micro processor is connected with the CRT module. The multi-functional marine HUD system has the advantages that the sensor system is combined with the display processor and the like, visual display of main marine parameters is achieved, the problem that when a mariner views various instrument parameters, distraction and visual fatigue are caused is eased, and a guarantee is added to navigation safety.