As the targets in the same beam are close to each other, it is difficult to resolve them via traditional techniques. Furthermore， it also brings difficulty in detecting and tracking. The problem of resoling two targets in the same beam was studied with array radar. An echo model of two unresolved targets with array radar was established. An improved angle estimation method was proposed based on the maximum likelihood estimation principle. In consideration of the convergence speed and estimation accuracy, the LevenbergMarquardt method was applied to obtain the maximum likelihood estimation of target direction. The simulation results prove that the method performs well in several aspects, including smaller estimation error and computational cost.