The invention discloses a high-frequency artificial zero-crossing technology-based outlet protection circuit breaker of a power generator. The high-frequency artificial zero-crossing technology-basedoutlet protection circuit breaker comprises a measurement and control unit, a rapid vacuum switch, an artificial zero-crossing loop and an energy absorption branch; during stable running of the powergenerator, the rapid vacuum switch is maintained in a closed state, the artificial zero-crossing loop is maintained in a broken state, and the energy absorption branch does not act; and when a short-circuit fault occurs in the power generator, a trigger gap of the artificial zero-crossing loop is immediately triggered by the measurement and control unit, an instruction is sent to the rapid switch,the artificial zero-crossing loop is input to run, meanwhile, the rapid vacuum switch is broken, a fault current is rapidly transferred to the energy absorption branch, and the energy absorption branch absorbs energy. By the high-frequency artificial zero-crossing technology-based outlet protection circuit breaker, the problem of short-circuit current zero loss is solved, and the short-circuit breaking capability of a traditional circuit breaker of the power generator is improved.