Abstract: The Canard Rotor/Wing(CRW) is an advanced high-speed rotorcraft concept. The rotor is also acting as the wing, and is one of the most important aerodynamic components of the plane. Hence, study on the hovering rotor/wing flow fields and its aerodynamic characteristics are of great value in theory and in practice. In this paper, the multi-block structural patched-grid is used to partition the space into several subzones, in which different references are chosen. So the hovering rotor/wing flow fields is calculated by solving Navier-Stokes equations in Multiple Reference Frames(MRF). The Caradonna-Tung rotor case is computed first to validate the method. Then a rotor/wing case is calculated and the thrust agrees well with experiment data obtained on the ground testing. The analysis indicates that the hovering flow fields for rotor/wing is quite different from those for traditional rotors.