An eutectic composition consisting of high energy density material DNTF and TNT was investigated by the phase diagram. A DNTF/TNT composition with high DNTF percent(wt%) was selected as the basic liquid carrier. A melt-cast explosive mixture with detonation velocity of 8 800 g·cm^-3 and explosive power of 159%TNT was developed. It could be used as the basic formula for shaped charge or fragmentation warhead.