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In order to complete micro four rotor UAVs autonomous landing based on visual informa-tion for the purpose of, a vision-based guidance system is developed, which takes advantage of the DM3730 dual-core processor produced by TI company. Consider the characteristics of the visual system, we select portable and reasonable hardwares, through the pre-processing on the image, using a relatively simple visual processing algorithm, identify the landing mark and calculate the information to complete aircraft autonomous landing.The experimental results show that system is reliable, under normal conditions, the system can effectively identify manual landing mark, calculate the relative position information of landing mark and aircraft for autonomous landing guidance.