In order to get the phase diagrams of 3，4-dinitropyrazole （DNP）/3，4-bis（3-nitrofurazan-4-yl） furoxan （DNTF） binary mixture system and understand the eutectic melting process， DSC was used to investigate the liquefaction and melting process of DNP/DNTF mixed system with different proportions. The T-x phase diagram and H-x phase diagram were established， and the effects of different heating rates and additives on melting process of eutectic were studied. Finally， the kinetic parameters E_a and A of eutectic melting process were calculated by Kissinger equation and Šatava-Šestak equation. Results show that the mass percentage of DNP/ DNTF eutectic is 70.38/29.62 and the eutectic temperature is 76.38 ℃ based on T-x phase diagram， which is good consistent with that from H-x phase diagram as 70.57/29.43. With the increase of heating rate， the initial temperature and peak temperature of melting process are delayed correspondingly. After the addition of Octogen （HMX） and nitroguanidine （NQ）， the melting point of the low eutectic is significantly delayed， while ammonium perchlorate （AP） has little effect on the melting point. The melting kinetic parameters E_a and A of DNP/DNTF eutectic are 19.13 kJ·mol^-1 and 10^9.74 s^-1 respectively， and the integral form of the most probable mechanism function is： G（α）=（1-α）^-1-1.