The invention discloses a high-precision laser positioning and navigation method based on dual reflective posts. Compared with geometric triangulation in the traditional technology, the method disclosed by the invention has the advantages that complex field information of reflected light is deeply mined and fully utilized, the technical bottleneck of the three reflective posts in the traditional meaning is broken, the operating condition is that data of two reflective posts is simultaneously detected, and the applicability of the laser navigation technology is greatly improved. Calculation errors caused by measuring errors are filtered by a filtering algorithm, and the positioning and navigation precision is greatly improved; and finally, although the lowest requirement of the method disclosed by the invention is to detect the two reflective posts, multiple reflective posts are possibly detected simultaneously during actual application. Due to design of data fusion processing, the information of the reflective posts can be subjected to maximum utilization, so that the precision is further improved.