A cooperative transmission method based on split-beam multiple access and an apparatus for performing the same are disclosed. In an embodiment, a cooperative transmission method, in a beam-splitting multiple access environment, for dividing a service object area into a plurality of beam sectors by a plurality of antenna arrays having at least one of a pattern characteristic and a polarization characteristic, includes: receiving a cooperation request from a user terminal located in the service object area; and a step of performing one of a macro diversity operation, a cooperative muting operation, and a cooperative beamforming operation on the user terminal based on an interference level included in the cooperation request.