The structure of FCC: BCC partially coherent interface is simulated by computer. The results show that the interface structure is varied with the orientation relationships. The structural models of varied orientations are made, which are defined by the lattice parameter ratio afcc/abcc= 1. 26 and ranged from K-S to N-W orientation relationship. The amount of deviation of the apparent habit plane from atomic habit plane {111}fcc is a function of orientation,and ranges from ca. 12 degrees to ca. 30 degrees. Computer simulations also found that the misfit dislocations could not be certain to exiet on the FCC:CC partially coherent interface.