To achieve electromagnetic signal recognition in complex environments, a specific emitter identification (SEI) method based on multi-feature parameter cluster analysis is proposed. By analyzing ten feature parameters related to emitter，establishing a specific emitter feature array, constructing a clustering equation, and using the separation between classes and intra-class clustering of electromagnetic signal parameters, the identification of specific emitter can be enabled. Theoretical analysis and experiments show that the multi-parameter calculation results of the expert scoring method are more discrete, which is a benefit to the identification of specific emitter. The research results provide strong support for promoting the development of electromagnetic signal detection and resolution technologies, and have technical reference value.