Disclosed are a method and apparatus for routing a short message and a computer storage medium. The method comprises: a short message service gateway acquires, from a short message service center, a short message and identifier information of a called UE used for receiving the short message; after the short message service gateway acquires the short message and the identifier information of the called UE, the short message service gateway acquires a short message delivery domain of the called UE corresponding to the identifier information of the called UE by communicating with a short message delivery domain decision device; and the short message service gateway delivers the short message to the called UE according to the short message delivery domain of the called UE.