In order to improve the image consistency, the factors influencing the image consistency was analyzed according to the principle of aperture-divided and amplitude divided method. In addition, one approach for improving the image consistency based on the fiber optics imaging was presented. Taking the six-frame divided by the pyramid as an example, the influences of the thickness, core diameter of fiber face plate and incident angle on image consistency were simulated by Lighttools. The results show that energy difference of the six image planes could be less than 0.3% with increasing of the thickness or decreasing of the core diameter of the fiber, when the incident angle ranges from 15 ° to －15 °.Based on the fiber optics imaging, the optical frame-divided structure by the pyramid can effectively improve the image consistency of framing camera.