Abstract: Based on the data comparison of classic Mars exploration mission,using the example of Mars Science Laboratory of America,the paper deeply analyzes and researches the Guidance,Navigation and Control(GNC)system of the whole process,and states the key technology systematically. Based on the current technology and development trend,it sumarizes the status of landing scheme of typical detectors,and puts forward prospect for the landing phase of future Mars exploration. The outcomes of this study can serve the design and demonstration of planetery exploration scheme in China.