65 parts of RDX crystal coated with 0.65 part of polymer and 35 parts of TNT were mixed and molten under vacuum at 85～90℃,then cast into aluminum moulds and let them solidify at room temperature,The results of exudation test and dimension of charges measured show that the exudate weights, irreversible growth values and density decrements of said charges are much less than those of RDX/TNT/MNT64. 78/34. 88/0. 34 (wt%) charges,where MNT is m- and p-mononitrotoluene.