Various techniques have been developed to treat peroneal tendon subluxation or dislocation, including superior peroneal retinaculum (SPR) reinforcement and repair, tendon rerouting, tissue transfer, bone blocking, groove deepening, and indirect groove deepening. Indirect fibular groove deepening is typically performed by accessing the intramedullary cavity through the distal fibula. Precise control of drilling direction and depth during intramedullary reaming is critical. In this paper, we introduce a novel technique to guide the direction of the bone drill during indirect fibular groove deepening. This method improves upon the existing indirect fibular groove deepening technique, offering an economical, simple, and equipment-independent solution.