Walnut cracker with adjustable hole diameter

The invention discloses a walnut cracker with an adjustable hole diameter. The walnut crackers comprises an upper handle and a lower handle hinged together, wherein arc-shaped parts are oppositely machined in the upper handle and the lower handle; the two arc-shaped parts can be combined to form a slot matched with the profile of a walnut to be cracked, a screw is arranged on the handle where onearc-shaped part is located in a penetrating manner; a clamp used for clamping the surface of the walnut to be cracked is installed at the end, stretching into the slot, of the screw, and a nut used for rotating the screw is arranged at the other end of the screw; a limiting bolt that can move up and down is installed at the holding part of one handle in a penetrating manner; and the minimal included angle between the upper handle and the lower handle is limited through adjusting the height of the limiting bolt. According to the walnut cracker, the condition that the walnut is cracked smoothlywithout hurting hands can