The invention relates to the field of waste ammunition recycling, particularly discloses a 8321 waste ammunition recycling process which is environment-friendly, safe, low in cost and reliable and solves the problems of treatment and recycling of 8321 waste ammunition for filling military antitank artillery shells. A 8321 explosive is an RDX-based mixed explosive, and consists of 94 percent of RDX, 3 percent of a 4# explosive, 2 percent of polyvinyl acetate and 1 percent of stearic acid. The bonding agent polyvinyl acetate is completely consistent with that for RDX-based SH-931(2) for a civil detonator. After the stearic acid and the 4# explosive in the 8321 waste ammunitions are destroyed, decomposed and removed by virtue of a technical measure, the recycled RDX is recycled for manufacturing a product such as SH-931(2) and a primer.