Abstract: This article proposes an adaptive selection method for aircraft landing safety zones. A two-level obstacle detection method is adopted, where the first level obstacle detection identifies data that deviates significantly from the base plane as obstacle areas, and divides non-obstacle areas into sub-areas for second level obstacle detection. The partition size can be adaptively adjusted according to the proportion of obstacle areas, taking into account factors such as slope difference with the base plane, obstacle value, and number of obstacles. A multi-faceted obstacle degree evaluation indicator is proposed to complete the selection of obstacle avoidance safety zones. After experimental verification with laser point-cloud data, this method can identify obstacle terrain, and the selected obstacle avoidance safety zone has no obvious obstacles, indicating the effectiveness of the method.