Super-resolution digital holography recording system can break through the limit of system resolution and improve the resolution of system. At present, in order to get high spectrum of object with CCD, designing different super-resolution recording system is an active area of research. Basing on sampling theorem and angular spectrum diffraction theory, the design of super-resolution digital holography recording system is discussed. The research result show that no matter how to design the system, the recording system have a optimization size value of the equivalent CCD. The resolution can not be improved when the equivalent CCD size is large than the optimization value. Based on the research result,the optimized design method of super-resolution recording system is presented. With the numerical reconstructed complex amplitude superposition method,the reconstruction images of different equivalent CCD sizes are presented.The experimental result is consistent with the theoretical analysis.