Abstract: The paper has proposed a spatial spectrum estimation method based on the spatial filtering approach. After the overlap subarrays are set in the array, the spatial jamming signals have been filtered and restrained using the adaptive beam formed by the subarray and the SINR is increased for the desired signal. Based on the secondary combination of the subarrays, the direction-of-arrivals are estimated with the outputs of the subarrays and the locations of the subarrays using the spatial spectrum estimation method in the desired spatial regions. Simulation results show the spatial spectrum estimation method based on the spatial filtering approach has improved the electromagnetic environment for the desired signal and the estimate accuracy and the antijamming ability achieved are better than regular spatial spectrum estimation method.