Novel retractable bicycle mud guard

The utility model relates to a novel retractable bicycle mud guard, which solves the problem that a road bicycle and a mountain bicycle cannot be used very conveniently on rainy days because the functions of the road bicycle and the mountain bicycle are special and the road bicycle and the mountain bicycle are provided with short mud guards or even are not provided with mud guards. The novel retractable bicycle mud guard is mainly and technically characterized in that by adopting a retractable design, the length of the mud guard is prolonged and the mud guard can be retracted freely when the mud guard is not required to be used. By adopting the design, the problem which occurs when the bicycles run fast on rainy days is solved, and the appearance of the bicycles on non-rainy days is not influenced. The novel retractable bicycle mud guard has the advantages of simple design, great convenience, low cost and easiness in popularization.