The invention provides an automatic driving vehicle takeover reminding device. The automatic driving vehicle takeover reminding device comprises a journey information obtaining module, an environmental information obtaining module, a traveling time forecasting module, an emergency state judging module, a reminding mode control module and a reminding module, wherein the journey information obtaining module is used for obtaining journey information from a navigation system, the environmental information obtaining module is used for obtaining environmental information relevant to the journey, thetraveling time forecasting module is used for calculating the forecast traveling time according to the obtained journey information and environmental information and calculating the current remainingtime of automatic driving according to the forecast traveling time, the emergency state judging module is used for judging the magnitude relationship between the current remaining time and the presettime threshold value to generate the emergency state judging result, the reminding mode control module is used for generating takeover reminding information according to the emergency state judging result, and the reminding module is used for conducting reminding according to takeover reminding information. By degrading the reminding emergency degree, the better reminding effect can be achieved,and more intelligence is achieved.