Laser irradiation on photo detectors of satellite-borne camera will form interference spots.The spots will cause blindness of the space borne camera,which will make it impossible to detect parts of the ground.Taking visible-band laser-irradiated satellite-borne camera as an example,the evaluation model of ground protection capability of laser-jammed space-borne camera is established,the main factors affecting the size of protection area are analyzed,and the ground protection effectiveness of laser-irradiated satellite-borne camera is evaluated quantitatively.