The invention relates to a method for predicting coal and gas outburst and secondary disaster dangerous area ranges thereof, which belongs to the field of coal and gas disaster prediction, and comprises the following steps of dividing a coal and gas outburst disaster-causing range into an impact disaster-causing dangerous area and a secondary disaster dangerous area; determining a judgment index and a threshold value of the disaster-causing dangerous area; investigating and researching mine parameters to be analyzed; through coal and gas outburst dynamic effect simulation inversion, obtaininga space-time evolution rule of a disaster-causing dangerous area identification index; calculating and verifying the space-time evolution rule of the judgment index of the prominent disaster-causing dangerous area; and determining the dangerous area range of outburst impact disaster, outburst induced gas explosion and outburst induced coal dust explosion. The method can be used for optimizing themine outburst catastrophe ventilation capacity and preventing outburst secondary disaster accidents.