Abstract: In order to solve the problem of the blind recognition of channel coding,a method of blind recognition of (2,1,m) convolution coding in the high error rate condition is proposed.Firstly,the mathematical model of the blind recognition is given,and then the linear error equation is solved though the decomposition of fault-tolerant matrix.The authors show that decomposing the fault-tolerant matrix of the intercepted codes can be used to solve the problem of blind recognition of convolution coding,which is a novel important research topic in adaptive communication,information interception and cryptanalysis.The simulation experiments show the proposed method can recognize the convolution coding parameters in the high error rate condition effectively.