The embodiment of the invention provides a method and a device for allocating recourses. The method comprises the following steps: grouping the MS of a mobile terminal, and allocating the resources for the MS according to a dispatch algorithm; selecting a subunit type corresponding to the MS according to resource allocation information or the modulation coding way of the MS; sending the resource allocation information; and excluding the resource allocation information of the MS in the resource allocation information of the subunit type as for the resource MS of the subunit type distributed and positioned in front of each subunit type in the resource allocation information sent, thereby saving the cost of the resource allocation information, saving the idle resource, and improving the efficiency of a frequency spectrum.