In this letter, the issue of two-dimensional (2-D) direction-of-arrival (DOA) estimation is discussed, and an extended virtual array based on covariance matrix (CM) or fourth-order cumulant (FOC) of signals from two subarrays is derived. Specifically, proposed method makes full use of sensors’ information by constructing virtual extended array, they can reduce the influence of noise and improve the Degrees-of-freedoms (DOFs) of arrays, thereby improving the estimation accuracy. Subsequently, the auto-paired angles can be obtained by CM of two subarrays (CMT). Simulations demonstrate the advantages of the proposed approach over the old one.