The utility model relates to an easy-assembly type large-diameter polytetrafluoroethylene molded ventilation pipe of a generator, which is characterized by comprising a polytetrafluoroethylene pipe with a pressing connector. One end of the polytetrafluoroethylene pipe is fixed to a lead-out bushing through a first flange, while the other end of the polytetrafluoroethylene pipe passes through the central wall of a base to be fixed to the central wall of the base through a second flange. According to the technical scheme of the utility model, the ventilation pipe can be firmly fixed and has the advantages of convenient assembly, disassembly and maintenance, easy bending, simple structure, large ventilation quantity and good ventilation effect.