The invention discloses a spherical mildewproof and deoxidation antistaling agent for cookies. In a key point of the technical scheme, the spherical mildewproof and deoxidation antistaling agent for the cookies consists of red bentonite, dolomite attapulgite clay, bauxite, sulfuric acid, high-viscosity attapulgite clay powder, sodium aluminate, reduced iron powder, tea polyphenol and calcium propionate. A method for producing the spherical mildewproof and deoxidation antistaling agent for the cookies comprises the following steps of: mixing a spherical mineral chlorine-free drying agent, the reduced iron powder, the tea polyphenol and the calcium propionate commonly, packaging, and thus obtaining the spherical mildewproof and deoxidation antistaling agent for the cookies. The spherical mildewproof and deoxidation antistaling agent for the cookies is put into a packaging container of the cookies, mildew prevention, deoxidation and refreshment are performed synchronously, and free oxygen and part of free water in packages of the cookies can be removed. The spherical mildewproof and deoxidation antistaling agent for the cookies is not mixed with cookie raw materials, so the inherent quality of the cookies can be ensured, the original fresh flavor of the cookies can be kept, and the spherical mildewproof and deoxidation antistaling agent for the cookies is suitable to be placed into various packages of the cookies.