Co nsidering the characteristics of several kinds of rotor movements and complicate d fus elage geometry shape of rotorcraft, a robust generation method for 3D structur e d embedded grid is established. 3D preliminary grids are generated by using th e Poisson equations for iterations, then 3D structured grid around the rotor bl a de with high quality is acquired. Based on this method, a parabolic marching met hod along the normal direction is established, which uses surface grid around co mplicated geometry shape as its preliminary grid. In the marching process, new P oisson equations modified by parabolic means, which source terms are determined by the Hilgenstock way, are used for smoothing iterations, and the difficulties of adjusting points on boundaries by using elliptic grid generation method are o vercome effectively. The advantages of the parabolic method is proved by using examination of minimum orthogonality of grid. The efficient way of hole cutting (″Top map″) and donor cells searching (″Inverse map″) a re i ntroduced further to 3D structured grid generation above, and the method for g enera t ing movingembedded grid around rotorcraft is established. It is demonstrated b y conducting computational fluid dynamics (CFD) calculations on the flowfields of CaradonnaTung rotor and V22 tiltrotor aircr aft respectively using the RANS equations that the grid generation method could mee t the demands of CFD calculations.