The anti-main lobe deceptive jamming method enables the radar to adopt the frequency diverse array （FDA） mode during signal transmitting and the phased array （PA） mode during signal receiving. In view of this， a jamming nulling method is studied in this paper. When the main lobe of the transmitting antenna pattern of the FDA is aligned with the position of the target to be identified， other targets are located at the nulls of the pattern. As a result， the problem of interference on radar can be solved when the target is located on the higher sidelobe of the array pattern in the case that the FDA is used for target identification. The computer simulation results prove that the jamming nulling method used in this paper is feasible and effective.