Pen-shaped wireless photoelectric mouse

The invention relates to a pen-shaped wireless photoelectric mouse which is a circular hollow pen holder internally provided with multilayer circular circuit boards fixed into a whole by a plurality of fixed frames, wherein all layers of the circuit board are electrically connected, and one end of the pen holder is provided with an optical lens fixed inside the pen holder by a bottom baffle. The bottom baffle is provided with a through hole corresponding to the optical lens so that light emitted by a light-emitting diode can be irradiated to a mouse pad and reflected back to an optical sensor. The other end of the pen holder is provided with a battery chamber, the outer wall of the pen holder is provided with a left key, a right key and a roller of the mouse, which are arrayed from bottom to top along the long axis direction of the pen holder, the upside of one end, provided with the optical lens, of the pen holder is provided with a pen clip, and the distance between the pen clip and the pen holder is the thickness of a USB (Universal Serial Bus) on a receiver.