The invention discloses a photoelectric sensing device and an implementation method thereof, belonging to the technical field of computer input devices. The device comprises a body, a transmitting tube, receiving devices, a circuit board and a cell unit, wherein the transmitting tube, the receiving devices, the circuit board and the cell unit are contained in the body; the transmitting tube and the receiving devices are electrically connected with the circuit board; the cell unit is electrically connected with the circuit board; a through hole is arranged on the bottom end face of the body; a power button is arranged on the body and controls the cell unit to be turned on; the transmitting tube is installed inside the through hole on the body and transmits infrared rays; the receiving devices are arranged at the two sides of the through hole; and an optical control circuit is arranged on the circuit board. The device has the following beneficial effects: the optical control circuit on the circuit board is utilized to be electrically connected with the transmitting tube and the receiving devices, thus ensuring the computer input device to detect and judge the movement locus of the device; and the device has a simple structure and low cost, is not limited by the working screen and has strong antijamming capability.