A scramjet-driven diagonal conducting wall (DCW) channel magnetohydrodynamic (MHD) power generation with combustion effeciency of 89% with effect of electromagnetic field was studied in this paper. The system evaluated was the Hypersonic Vehicle Electric Power System (HVEPS) scramjet-driven MHD generator. The channel MHD generator used is directly integrated into the propulsion system. Computation results with loading condition show the gas dynamic properties, electrical properties and MHD electrical power generation with load current effect are presented here. It was obtained that value of peak loading level at 43.9 A with diagonal angle setting at 60. Keywords- Magnetohydrodynamic generator, diagonal conducting wall channel type, one-dimeensional analyses, scramjet.