As a basic component of signal transmission and data exchange, the optical router is widely used in the on-chip optical interconnection network. The two-dimensional optical router can effectively reduce the complexity of the system and meet the routing requirements of on-chip optical interconnection networks with various topologies. Therefore, a small-size and low-loss two-dimensional optical router based on a single micro-ring resonator is proposed. The proposed scheme can realize two-dimensional routing switching by using only one micro-ring resonator. The two-dimensional optical router has a maximum crosstalk of -11.65 dB and a size of only 100 μm×65 μm. It has the advantages of simple structure and small size, and can be widely used in signal processing systems, communication systems, and interconnection systems.