The invention discloses a method for monitoring safety working of a rotation travelling wave. The method comprises the following steps of S1, building a rotation travelling wave tube model according to complicated plasma formation and evolution; S2, setting a parameter range of the rotation travelling tube during normal working; S3, continuously inputting an electronic beam and an external magnetic field to the rotation travelling tube model, judging whether a working parameter is within the parameter range during normal working, if yes, continuously outputting a microwave by the rotation travelling tube model, otherwise entering the step S4; and S4, temporally stopping inputting the electronic beam and the external magnetic field to the rotation travelling tube model until the working parameter is returned to the parameter range during normal working, the rotation travelling tube model continuous to work and the microwave is continued to output. With the regard to the problem of poorcontinuous working reliability of the rotation travelling tube, the rotation travelling tube model is built, and effective improvement guidance is made for continuous working reliability of the rotation travelling tube.