The invention discloses a method for manufacturing a bottle cover for preventing an upper cover from being pried. The bottle cover comprises an upper cover and a spiral cover, wherein the spiral coveris fixed inside the upper cover; a circle of a convex structure I is arranged on the outer side wall of the bottom of the spiral cover; the upper cover comprises an upper part cover and a lower partcover of an up and down structure; and a circle of a convex structure II is arranged on the inner side wall at the bottom of the lower part cover. The method comprises the following steps: during bottle cover manufacturing, when the upper cover is mounted on the spiral cover, firstly, feeding the bottom of the spiral cover into the lower part cover from the top of the lower part cover, and pressing the convex structure I of the spiral cover to the convex structure II of the lower part cover; and secondly, feeding the top of the spiral cover into the upper part cover from the bottom of the upper part cover, and splicing and fixing the upper part cover with the lower part cover, wherein the sizes of the two convex structures meet the requirement that the convex structure II is not dissociated from the convex structure I upwards in an axis direction of the bottom cover. If the bottom cover is delivered to the market, the phenomenon that the upper cover is dissociated from the spiral coverby using a screw driver or a cover opener is avoided, and marks can be made on the upper cover if the upper cover is opened with force.