In view of the low accuracy of Hough transform in road edge detection, this paper presents a research method of MATLAB splicing technology and fuzzy control algorithm based on Hough transform. On the premise of guaranteeing the original photographic image not to be distorted, the method splices several groups of experimental photos through MATLAB, and then extracts the road edge lines by Hough transform. In addition, the fuzzy control algorithm is used to control the flight direction of the rotorcraft and the final tracking trajectory is drawn when the obstacle is extracted. Experiments show that compared with the traditional Hough transform, the proposed method can increase the proportion of the target road in the image in complex environment by mosaic technology. This method has the advantages of strong anti-jamming ability and high running efficiency, and can control the flight direction of the rotorcraft by fuzzy control algorithm when the target road cannot be accurately identified, thus effectively improving the accuracy of target road detection and planning the tracking route of the rotorcraft.