Provided in the embodiments of the present invention are a frequency spectrum processing method and device, the method comprising: a first base station obtaining a system message and a reference signal (RS) of a second base station; according to the system message and the RS of the second base station, the first base station determining an interference value of a first frequency spectrum of the first base station to a frequency spectrum currently used by the second base station; when the interference value of the first frequency spectrum of the first base station to the frequency spectrum currently used by the second base station is less than or equal to a preset threshold value, the first base station activating a flexible transmission function of the first frequency spectrum. The present invention reduces the possibility of interference to a frequency spectrum currently used by a second base station after directly activating a first frequency spectrum, and improves utilization rate of the frequency spectrum
