In order to meet the requirements of the integrated precision of the reflector used for space remote sensor,the choices of the minitype reflector which has a convex aspherical surface and the supporting way are introduced.According to the positioning principle of the reflector,a kind of supporting structure is designed.CAD/CAE engineering software is used to analyze and optimize the supporting structure′s materials and the supporting way.At last,a kind of effective circumjacent support structure is designed.The surface deformation is less than λ/10（PV）and λ/50（RMS）（λ=632.8 nm）.Finally,the change of reflector surface deformation is tested by the mechanical environment test.It is proved that the structure of the reflector meets the demand of the optical designer.