Numerical flow analysis around the HSCT (High Speed Civil Transport) model was carried out using multi grid Euler code. The results are evaluated by comparing with results of supersonic wind tunnel test that was conducted by NAL. The numerical results were well agreed with wind tunnel test results in pressure integrated value (CL, CM). As for the drag coefficient, the boundary layer correction was performed to results of Euler code and it made the drag (CD) closer to wind tunnel results than original Euler results. All these analysis took four hours/case on EWS and it seems reasonable time and quality level for preliminary aerodynamics examination phase.