Orbital angular momentum (OAM) at radio frequency (RF) provides a novel approach of multiplexing a set of orthogonal modes on the same frequency channel to achieve high spectral efficiencies. However, OAM communication system requires perfect alignment of the transmit and the receive antennas and this harsh precondition greatly challenges practical multiplexing gain of OAM system. In this paper, we propose a UCA-based multi-mode OAM reception method including the beam steering with the estimated angle of arrival (AoA) and the amplitude detection with the estimated distance. Both mathematical analysis and simulation results validate that the proposed OAM reception method can completely eliminate the effect of the misalignment error of a practical OAM channel and approaches the performance of an ideally aligned OAM channel.