Aiming at reducing the calculation amount of the CFD simulation on aerodynamic f orce of tiltrotor in transition flight, a new highlyeffective hybrid CFD metho d is proposed. An embedded grid system with the corresponding digginghole and donor elemen t searching method is presented. By combination of blade element theory and mome ntum theory, a simplified momentum source technology, i.e. virtual rotor model (VBM) is established. In order to analyze the details of aerodynamic force of the tilt rotor in transition flight, the multilayer embedded grid system and the single program multiple data (SPMD) m odel parallel acceleration technology are adopted in the real blade model (RBM). Then, a highlyefficient hybrid blade model (HBM) is established by combining VBM and RBM methods. Finally, a typical rotor and 7A rotor are taken as numerical exa mples to verify the validity of VBM and RBM respectively, and the aerodyn amic force of tiltrotor in transition flight with different tiltangles is ana lyzed by three methods also. It is demonstrated that VBM shows the most optimal efficiency in the simulation of the aerodynamic characteristics of the tiltrotor in conversion. Onethird computatio n time is saved by the HBM method compared with the RBM method with the guaranteed accuracy of the flow solver.