The invention discloses an analysis method of an unmanned aerial vehicle detection range. The analysis method comprises the following steps: S1: dividing a target region into grids, and calculating the area of a three-dimensional terrain corresponding to each grid; S2: constructing a virtual camera view frustum, carrying out intersection calculation on the virtual camera view frustum and the three-dimensional terrain through GPU (Graphics Processing Unit) automatic cutting, calculating the detection range of an unmanned aerial vehicle wave beam, obtaining a practical region area detected by the one-time wave beam scanning of the unmanned aerial vehicle, and meanwhile, recording the irradiation duration and distance of all grids in a boundary line; and S3: in a whole detection process, carrying out statistics on the practical region area detected by each-time scanning wave, and the irradiation duration and distance of all grids in the boundary line, and carrying out coloring on the grids according to the irradiation area, duration and distance of the grids. By use of the analysis method of an unmanned aerial vehicle detection range, the detected terrain is preprocessed, the detection range can be quickly calculated through hardware cutting, detection information is displayed through a color temperature map, an amount of information is large, and an effect is visual.