Abstract: Introduction The paper aims to provide a feasible and meaningful reference to electricity transmission investment and power grid reform. Method To investigate the mechanism of electricity transmission concession of Peru, we analyzed the regulation, law and revenue mechanism, investment risk. Result The results we obtained demonstrate that electricity transmission concession mechanism is mature and reduced the construction cost as well as attracted sufficient investment. Conclusion We demonstrate the overall risk of electricity transmission investment is low, but specific risk analysis is must to specific project,this work provides some reference for power grid reform.