Protective bottle cap

The utility model discloses a protective bottle cap which comprises an outer cap and a connecting body, an internal thread of the outer cap is connected to a bottle opening in a screwed mode, the connecting body is buckled on the outer side of the outer cap, and a circle of inner edge for limiting the connecting body to move downwards is arranged on the inner side of the bottom of the outer cap inthe circumferential direction. According to the protective bottle cap, the outer cap body is the phenolic resin outer cap body, safety is good, toughness, abrasion resistance and corrosion resistanceare good, the effect of preventing children from eating the protective bottle cap by mistake can be achieved, and substances in a bottle can be better protected; the outer cap and the connecting bodyare connected in an up-down buckling mode through the first protruding block and the second protruding block, when the bottle cap is screwed tightly, the outer cap is pressed downwards, and the outercap and the connecting body