Under the background of noncooperative interference cancellation, through the establishment of the received signal models of different array manifolds, the representation parameters of spatial resolution were proposed to measure the resolution and cancellation ability of different array manifolds to the close reach angles of interference signals and communication signals, and the influencing factors of spatial resolution were analyzed. The new evaluation criterion for array design of noncooperative interference cancellation was provided. The array transfer factor and output signal to interference plus noise ratio were derived as the evaluation criterions of array spatial resolution. From three aspects of array configuration, number of array element and array radius, the spatial resolution of different array manifolds were analyzed by simulation. And the results were verified by experiments. The experimental results are in good agreement with theoretical analysis and simulation, and the importance of spatial resolution on interference cancellation is proved. It provides the basis for subsequent array manifold optimization and auxiliary antenna design.