The invention discloses a bottle opener used for opening a cork bottle cap. The bottle opener comprises two supporting rods arranged in an inverted splayed mode, two handles, a bottle body fixing ring and a cap opening ring. The two handles are movably connected with the upper ends of the supporting rods respectively. The bottle body fixing ring is fixed between the lower ends of the two supporting rods. The cap opening ring is fixed between the top ends of the two handles. A circle of zigzag structure is arranged on the inner wall of the cap opening ring. The cap opening ring and the bottle body fixing ring are of an adjustable structure. The bottle opener is simple in overall structure, attractive in appearance and convenient and effortless to operate; besides, as the bottle body fixing ring is of the adjustable structure, the bottle opener can be used for various bottle bodies with different specifications and is an ideal substitute product of a traditional bottle opening tool.