High power zone plate is an important imaging element for soft X-ray.This paper analyses the spherical aberration of non-aplanatic point imaging of aplanatic system. The characteristic of aplanatic system shows that non-aplanatic point imaging can produce aspherical holographic interference for high resolution zone plate fabrication used for X-ray imaging. The parameters of X-ray zone plate, to be used in beam line of Hefei National Synchrotron Radiation Laboratory of China, and the configuration of an aplanatic system for making high power X-ray zone plate are also presented.