Throwing ball

A throwing ball is provided with a liner and a polymer foaming surface layer coated on the liner; the liner is a solid body, and the polymer foaming surface layer is an integral covered coating layer directly formed by foaming of polyurethane out of the solid liner. The utility model solves the deficiencies of the prior art, has the advantages of reasonable structure, good elasticity, soft texture, good wear resistance and anti-impaction capability, does not harm the body of children in exercise, has good safety performance and can advance and extend the age of ball exercise. The size and the weight of the throwing ball can be regulated according to the filling material in the liner, so as to obtain balls of all dimensions with the same size and the different weight or with the same weight and different size.