An object of the present invention is to provide a unidirectional rotating motor, which can avoid reverse rotation of the motor due to heavy loads. The present invention employs the following technical solution. A unidirectional rotating motor is provided, comprising an output shaft; one end of the output shaft is, as an output end, extended to an outer side of the motor, and the other end of the output shaft is, as a fitting end, provided with a unidirectional bearing; an inner ring of the unidirectional bearing is linked to the fitting end of the output shaft and an outer ring of the unidirectional bearing is fitted with a first bushing and a second bushing; the first bushing consists of a first bushing segment I and a first bushing segment II, and the first bushing segment I has an inner diameter greater than that of the first bushing segment II; the second bushing at least consists of a second bushing segment I and a second bushing segment II, and the second bushing segment I has an inner diameter greater than that of the second bushing segment II; the first bushing and the second bushing are detachably fixed; and an outer bearing is fixed on an outer side of the second bushing, and an inner ring of the outer bearing is fixed to the second bushing.