Abstract: Ship-radiated noise recognition based on Continuous Hidden Markov Models(CHMM) is achieved.MelFrequency Cepstral Coefficients(MFCC) are used as features.Ship-radiated noises of five different classes are modeled and target recognition experiments are conducted.the number of states and Gaussian mixture is set to be 1 and 3 respectively.The average recognition rate is up to 91.6% for 5 different ships.Noises of two different ships are used to analyze the impact of different operating condi-tions on the recognition rate.