The invention discloses a method and a device used for identifying number attribution information. The method comprises steps that a sample short message set is acquired; titles used for identifying number attribution information are extracted from sample short messages of the sample short message set; titles of sample short messages corresponding to one same short message sending party number are merged; the attribution information of the short message sending party number can be identified according to the merged information, the attribution information of the short message sending party number in the sample short message set can be automatically identified, manpower resource waste caused artificial identification can be avoided, and identification efficiency is further improved.