[en] Under water environment, nanometer RDX was produced by wet grinding. With the help of Zetasizer Nano, field emission scanning electron microscope, Custer type hammer instrument, its particle size distribution, morphology appearance, the sense and other properties were characterized and then the safety of the process of crushing was analyzed. The experimental results show that the sensitivity of nanoscale RDX prepared by wet method is significantly reduced and the safety is improved. Due to the low cost of this method, it is possible to reutilize large-scale recycled RDX, which solves the difficulties of storing and transporting the RDX and expands its scope of use. (paper)