This papermakes some improvement to the Pa1. King fuzzy edge－detection algorithm, and brings forward a improved fuzzy edge2detection algorithm. This improved algorithm not only simp lifies complex calculation, but also brings out a new transformation of fuzzy enhancement, and reduces the count of iterations. This algorithm has a good ability of edge detection and restraining. Finally, experiments are put forward, and it can be seen by comparison that the improved algorithm improves the algorithm efficiency, and has powerful ability in detection fuzzy edge and exiguous edge. It is a promising and app lied image processing algorithm.