The template contrast method is abated because of that the difference between different radiant points trails off. From the point of view of engineering application, this paper presents a specific emitter identification method. In order to identify the difference between different radiant points, first the Fisher's discriminate ratio is employed to select the effective features, and then the principle component analysis is done to reduce the feature dimension. Finally, the support vector machine is used to perform the identification. The simulation result shows that the method can give attention to both accuracy and speed of identification simultaneously, and is of better application value in the identification of different radiant points.