Abstract: It’s an economical way to use the presplit blasting to ensure the slope integrity in the process of building the reservoir of pumped storage power station. However, as perennial drought in Northwest, weathered rock and fracture zones in mountain, control of pre-split blasting is important. Taking Huhehaote pumped storage power station as an example, the paper introduced the scheme design, loading dose, initiation network, security measures, construction organization and effect of the presplit blasting. Further, blasting effect was analyzed, for reference.