The invention discloses a circuit breaker opening/closing coil current signal identification method comprising the steps as follows: collecting an opening/closing coil current signal under normal operation of a circuit breaker operating mechanism, and extracting a feature data set; establishing a benchmark mode library of the circuit breaker opening/closing coil current signal; calculating the degree of fitting between a sample to be identified and the clustering centers in the benchmark mode library, and finding out the clustering center with the maximum degree of fitting; and identifying the operation rate of the circuit breaker operating mechanism according to the residual ratio, and realizing early warning for failure. According to the invention, a benchmark mode library is established for the circuit breaker opening/closing coil current signal based on a subtractive clustering algorithm, and when the circuit breaker is in an operation or maintenance state, the circuit breaker opening/closing coil current signal is compared with the benchmark mode library online to identify the operation state of the circuit breaker. Therefore, effective early warning for failure is realized, the need for fast, safe and efficient circuit breaker detection is satisfied, the shortage of the existing circuit breaker mechanical characteristic test method is solved effectively, and safe and stable operation of circuit breakers is guaranteed.