The present invention discloses a resource allocation method and apparatus for resolving a technical issue of a conflict of transmission resources used by user equipment adopting mode 3 and user equipment adopting mode 4. The method comprises: a base station determining whether a shared transmission resource pool shared by first-mode user equipment and second-mode user equipment includes available resources, wherein a transmission resource of the first-mode user equipment is allocated by the base station, and a transmission resource of the second-mode user equipment is selected from the shared transmission resource pool; and if the base station determines that the shared transmission resource pool includes available resources, the base station allocating, on the basis of the available resources, a transmission resource to the first-mode user equipment.