The invention discloses an active dynamic positioning method, which comprises the following steps of: 1, shooting a target to be detected at a first flow point by using satellite positioning and a digital camera to obtain a first image, and acquiring accurate coordinates of the first flow point to obtain and calculate an exterior orientation element of the first image; 2, shooting the target to be detected at a second flow point by using satellite positioning and the digital camera to obtain a second image, and acquiring accurate coordinates of the second flow point to obtain and calculate anexterior orientation element of the second image; and 3, calculating the three-dimensional coordinates of the target to be detected according to the first image, the accurate coordinates of the firstflow point, the exterior orientation element of the first image, the second image, the accurate coordinates of the second flow point and the exterior orientation element of the second image. By adopting the method, accurate positioning of a target which cannot be reached is realized.