Bluetooth antenna for door lock and intelligent door lock

The utility model provides a Bluetooth antenna for a door lock and an intelligent door lock. The Bluetooth antenna comprises an antenna body and a Cable line, the antenna body comprises a metal grounding layer, an insulating substrate layer and a metal radiator layer which are stacked in sequence; the metal radiator layer is square, and a group of opposite angles of the metal radiator layer are provided with chamfers; the Cable wire is vertically connected to the antenna body from one side of the metal grounding layer, a braid layer of the Cable wire is electrically connected with the metal grounding layer, and a core layer of the Cable wire sequentially penetrates through the metal grounding layer and the insulating substrate layer and is electrically connected with the metal radiator layer. When the Bluetooth antenna is installed, the metal grounding layer faces indoors, the metal radiator layer faces outdoors, a Cable line is vertically connected into the antenna body from one side of the metal grounding l