This paper proposes a new design method of osculating-cone waverider. Based on the conical flow field, with Flow Capture Curve (FCC) and Inlet Capture Curve (ICC) unchanged, a new curve is introduced to broaden the design space of conventional osculating-cone waverider. By adjusting the radius of curvature of the exit shock to achieve the purpose of changing the volume and volume efficiency of the waverider, in this study, four kinds of waveriders are designed, including the traditional osculating-cone waverider, the shock radius-reduced waverider, the shock radius-lengthened waverider, the waverider with straight line ICC. The CFD numerical simulation method was used to compare and analyze these waveriders designed in this paper. The results show that under the inviscid condition, the waverider with low volume efficiency has a larger lift-to-drag ratio; under viscous conditions, these four waveriders behave close lift-to-drag ratio property, but the waverider newly designed in this paper has a larger volumetric efficiency and better engineering application value.