Abstract: This paper proposes a malicious software detection method based on power consumption. Firstly, the mobile terminal's power consumption status is obtained, and the Gaussian mixture model (GMM) is built by using Mel frequency cepstral coefficients (MFCC). Then the GMM is used to analyze power consumption, and then identify malicious applications through the application software classification processing. Experiments show that an application software function and its power consumption have a close relationship, and some malicious applications in mobile terminals can be detected accurately through analyzing software power consumption information.