The invention discloses an easy-to-open canned bottle cap. The canned bottle cap comprises a cover body, and is characterized in that a rectangular groove which penetrates through the cover body transversely is formed in the cover body, a rotary auxiliary rod is arranged in the rectangular groove, one end of the rotary auxiliary rod is hinged to the position, close to the edge, of the rectangulargroove, and the length of the rotating auxiliary rod is smaller than the diameter of the cover body; and the groove width and the groove depth of the rectangular groove are both 0.8cm, and the diameter of the rotating auxiliary rod is 0.6 cm. According to the canned bottle cap, when the easy-to-open canned bottle cap is opened, the rotating auxiliary rod can be rotated out, the rotating auxiliaryrod is grasped by a hand to turn the bottle cap so that the easy-to-open canned bottle cap can be easily unscrewed, and therefore great convenience is provided for people to eat canned food.