The invention relates to optical repeater equipment for optical power enhancement in the field of GEPON technology. A GEPON optical repeater for a smart grid comprises a mechanical switching unit, a WDM unit, a circuit module, a microprocessor module and a power supply unit, wherein the mechanical switching unit comprises a number of one-to-two optical splitters, an optical splitter switching joint and an optical splitter switching motor, the mechanical switching unit is located between the WDM unit and an ONU, a rotor of the optical splitter switching motor is fixed with the optical splitterswitching joint, the optical splitter switching motor is controlled by the microprocessor module, the optical splitter switching joint is clamped with the one-to-two optical splitters, and two branchoptical fibers of the one-to-two optical splitters are connected with the ONU. The scheme of the invention has the following beneficial effects: a mechanical switching unit is added to a traditional optical repeater, and the problem of distributing optical power according to the needs of the ONU can be solved.