To solve these gray reversal and embossing effect problems, an imaging experiment platform for studying high repetition frequency character of image intensifier was set up. Experimental research was made on the relationship between the double-frame imaging and system parameter like exposure time and delay time. Experimental results show that the problems of the second frame were caused by the saturation of the first frame, and the generation principle of gray reversal and embossing effect was analyzed. By increasing the gain of AD sampling the gray reversal and embossing effect problems were solved. The results of this paper provide theoretical and experimental basis for the imaging application of image intensifier at high repetition frequency.