The thermal decomposition behavior of hydroxyl-termined polyether(HTPE)/ 1, 1-diamino-2, 2-dinitroethene (FOX-7) and HTPE/N-guanylurea-dinitramide(FOX-12) mixed systems under different heating rates(2.5, 5.0, 10.0 ℃·min^-1 and 20.0 ℃·min^-1)were investigated by differential scanning calorimetry(DSC) and thermogravimetry-derivative thermogravimetry(TG-DTG)analysis. The thermal decomposition apparent activation energy of HTPE, HTPE/FOX-7 and HTPE/FOX-12 mixed system were calculated by Kissinger′s and Ozawa′s methods. Results show that the thermal decomposition apparent activation energy of HTPE by Kissinger′s is 127.45 kJ·mol^-1. Thermal decomposition of HTPE is a mass loss process. Apparent activation energy of HTPE/FOX-7 mixed system calculated by the two methods are 288.16 kJ·mol^-1 and 270.85 kJ·mol^-1, respectively, and 179.50 kJ·mol^-1 and 170.35 kJ·mol^-1 for HTPE/FOX-12 mixed system.Compared with FOX-7 and FOX-12, the apparent activation energy of mixed systems decrease by 17.1-34.5 kJ·mol^-1 and 78.8-87.9 kJ·mol^-1, respectively. The main decomposition peak temperature for insensitive energetic components (FOX-7 and FOX-12) are decreased by HTPE with 14.4 ℃ and 17.4 ℃. The heat release during decomposition process for HTPE/FOX-7 mixed system increases 196.2 J·g^-1 and decreases 275.2 J·g^-1 for HTPE/FOX-12 mixed system.