The thermal behaviors of tetraethylammonium dodecahydrododecaborates(BHN) were investigated by DSC and TG-DTG techniques. The compatibilities of BHN with 2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexanitrohexaazaisowurtzitane(CL-20), 3, 4-dinitrofurzanfuroxan(DNTF), N-guanylurea-dianitramide(FOX-12), cyclotetramethylenetetranitroamine(HMX), glycidyl azide polymer(GAP), cyclotrimethylenetrinitramine(RDX), ammonium perchlorate(AP), lead 3-nitro-1, 2, 4-triazol-5-onate(NTO-Pb), hydroxyl terminated polybutediene(HTPB), di-2-ethylhexyl sebacate(DOS), 2, 4-toluene diisocyanate(TDI), isophorone diisocyanate(IPDI), cupric adipate(AD-Cu), Al powder and Mg powder were examined by DSC method as well as vacuum stability test. The results indicate that there is one main exothermic decomposition stage for BHN sample, the peak temperature is 305.8 ℃. The compatibilities of BHN with CL-20, HMX, GAP, RDX, AP, NTO-Pb, HTPB, DOS, IPDI, AD-Cu, Al powder and Mg powder are fair. These materials mentioned above can be used as components in preparation of propellants and explosives, whereas, the compatibility of TDI with BHN is bad.