In order to solve the problem of blind recognition of channel coding, the method of blind recognition of extended Golay code is proposed. Compared with the former blind recognition, the recognition probability has been obviously improved. This is a brand-new subject for research and has important application in such fields as adaptive communication, information interception and cryptanalysis. The simulation experiments show that the recognition probability for extended Golay code of the proposed method in the thesis is above 99%, enhanced by 44% compared with the original method at a bit error rate (BER) of 8×10-2.