In the field of energetic materials, cocrystallization is a new strategy to modify the properties of existing energetic materials. N,N- Bis (Trinitroethyl) nitramine (BTNEN), is a known energetic material which possesses high sensitivity and detonation performance. In order to reduce its sensitivity, a novel cocrystal of BTNEN/HMX was successfully prepared and characterized. The cocrystal has a melting point of 155 degrees C which is lower than the melting point of HMX (275 degrees C) and higher than pure BTNEN (94 degrees C). The SEM images revealed that the cocrystal has got a plate morphology, which is different from its pure components. The shifts in the FT-IR spectrum of the cocrystal in comparison to the pure substances prove the formation of intermolecular hydrogen bonding. Powder X-ray diffraction (PXRD) spectra revealed that the cocrystal is different from the raw materials. In addition, impact sensitivity test confirmed that the sensitivity of BTNEN/HMX was effectively decreased in comparison to BTNEN. The density of the product was measured to be 1.93 g cm(-3) and based on the density value, the detonation velocity and detonation pressure were calculated to be 9.38 km s (-1) and 42.95 GPa, respectively.