2，4，7，9，11，14-hexanitro-2，4，7，9，11，14-hexaaza-tricyclo ［8.4.0.0^3,8］ tetradecane-5，6，12，13-difuroxan(HHTTD) was synthesized from nitration of HTTD (Ⅲ) that was the aicd-promoted condensation product of 3,4-diaminofurazan and diformyltetrohydroxypiperazine. Their structures were characterized by elemental analysis,IR and MS spectra. The detonation velocity of HHTTD maybe up to 9.5 km/s.