The invention relates to a linear target drop point positioning method based on aerial three-dimensional positioning. The method is suitable for a linear target drop point positioning system based ondouble-station imaging observation, and can avoid a measurement error caused by inaccurate positioning of a landing pixel point due to target landing explosion. The method comprises the following steps: firstly, carrying out image TopHat transformation, background suppression and filtering enhancement; carrying out Image threshold segmentation, and removing connected regions with weak linear characteristics; Detecting a suspected linear target in the image by adopting a Hough algorithm, carrying out track association, tracking a track conforming to the motion characteristics of the target, positioning a target landing frame, and outputting an azimuth angle and a pitch angle of a start-stop pixel point of the linear target in the image before landing; Finally, based on a double-station direction finding intersection model, carrying out aerial three-dimensional positioning on a target before landing, and establishing a three-dimensional space linear equation of the target; And finally, according to the target GPS information, predicting a target drop point position to realize three-dimensional positioning of a target drop point.