A channel resource distributing method and device of a cellular system are disclosed in the present invention, wherein, the method comprises: step one, to divide the channel resource in each sector of cellular system cell into multiple according the frequency spectrum, and to lead each channel resource to have priority for deciding using order; step two, in the sectors of each cell existing co-frequency interference, by setting the priority, to lead each sector existing co-frequency interference to use firstly the channel resource with different frequency to the interference cell. The presentinvention fractionizes the channel resources in the vectors, effectively avoiding the co-frequency interference. The priority of the channel resource is pre-established, and solidified in configuration of the cell sector, needless to calculate real time, the method is simple and easy, and the cost is lower.