With the continuous development of Multifunctional Phased Array Radar (MPAR),its characteristics of multifunctional states and strong self-adaptive capability make the traditional behavior identification method unable to adapt to the needs of modern warfare.In this regard,a radar behavioral state identification method based on the modified D-S evidence theory is proposed.The method takes the spatial motion state and antenna scanning mode as auxiliary features and fuses the double-chain HMM estimation results through the modified D-S evidence theory to obtain the final identification results.The simulation experiment results show that the proposed method can effectively solve the evidence conflict problem which cannot be handled by the traditional D-S evidence theory,and it shows stronger robustness in the case that the accuracy of radar word extraction decreases.