The contact angles,surface free energies and dispersive，polar component of hexanitrostilbene (HNS),nitroguanidine(NQ) and the paste were determined and were calculated by the wicking permeation method and the Washburn equation. The surface free energy agrees well with the theoretical calculated result. The surface free energy of NQ is 58.31 mJ·m^-2 and the dispersive component is the main parting of it. The dispersive component of NQ is 54.73 mJ·m^-2. The surface free energy of HNS is 17.97 mJ·m^-2. The dispersive component of HNS is 8.27 mJ·m^-2. The polar component of HNS is 9.70 mJ·m^-2. The surface free energy of paste is 21.96 mJ·m^-2. The dispersive component of paste is 17.28 mJ·m^-2. The polar component of HNS is 4.68 mJ·m^-2.