In order to improve the antijamming ability of radar and synthesize the most effective antijamming measures in accordance with, a jamming recognition method is proposed based on SPWVD features analyzed. In this method, SPWVD distribution of received radar signal is given firstly, and feature extraction of radar active deception jamming by separating degree in timefreqency domain and Renyi entropy is put forward based on its distribution difference. Finally, these two features are used in jamming recognition. The simulation results show that the technique is effective and stable in recognizing active deception jamming signal. And by doing so this provides the selections of followup antijamming measures with a priori information.