The invention relates to a bottle cap, in particular to an anti-counterfeiting bottle cap having the functions of self-locking and self-destroying. The self-destruction type anti-counterfeiting bottlecap comprises an outer main body, an inner plug, a small transparent part, a big transparent part, an outer cap, a top cap, a middle cap and an inner cap; wherein, the inner side at the middle part of the outer main body is provided with internal thread matched with the periphery of a bottleneck by screw thread, the inner side at the upper part of the outer main body is provided with a pluralityof separable bodies which are convex inwards and connected to the outer main body in a way of breaking points; the inner plug is a column provided with openings at the upper and the lower parts; the small transparent part is propped against an upper end arm of the inner plug; the big transparent part is positioned above the inner plug and provided with external thread; the lower part of the outercap is sheathed inside the upper part of the outer main body, the outer surface of the part of the outer cap being sheathed inside the outer main body is provided with a plurality of lugs, the positions of which are corresponding to those of the separable bodies; the top cap is fixedly connected with the outer cap; the middle cap is fixed on the outer cap and the top cap; the inner cap is used forsealing the upper part of the big transparent part. The bottle cap has strong anti-counterfeiting performance, good sealing property and simple assembly and production.