The invention discloses a closed pipeline type electric generator which comprises a closed pipeline, a disc type draught fan and disc type electric generators. The disc type draught fan and the disc type electric generators are arranged in the closed pipeline. The disc type draught fan is driven by external electric energy to rotate, strong air flow is produced in the closed pipeline and drives the disc type electric generators to generate electricity, when electricity generated by the disc type electric generators is large enough to be used by the disc type draught fan during grid-connected operation, an external power supply is omitted, a self-generating power supply is applied, then the self-generating power supply can ceaselessly supply power to the disc type draught fan through a wire so that strong air flow can continue to be produced, and therefore the closed pipeline type electric generator which never stops is formed; the closed pipeline type electric generator is installed on an automobile, abundant electric energy produced by the closed pipeline type electric generator is converted into kinetic energy through an electric motor, the closed pipeline type electric generator replaces an existing engine and drives the automobile to advance, ceaseless power can be provided for the automobile without burning oil, and therefore petroleum resources are saved, no environment pollution is caused, and the body health of people is not harmed.