The invention relates to an intelligent identification system used for substation secondary cable tags, and is used for rapidly identifying secondary cables. The system comprises a cable tag arranged on each cable, a plurality of tag readers, an onsite work station and a server, the plurality of tag readers separately communicate with the onsite work station through a wireless network, the server communicates with the onsite work station, and the tag readers are used for reading information on the cable tags. Compared with the prior art, the system is advantageous in that paper and radio frequency are combined, fine management is facilitated, the data is safe and reliable, and economy and practicality are achieved.