Electrostatic accumulation caused from RDX explosive and RDX/Al composite explosive friction was tested with a onemeter long flume. The results show that RDX obtain electrons while sliding on flume, and electrostatic accumulation (which is from -3.0 μC·kg^-1 to -5.0 μC·kg^-1) has a linear relationship with the mass of RDX. The characteristic of static electricity and electrostatic accumulation change after the addition of aluminum powder. The maximum electrostatic accumulation of RDX/Al is 1.19 μC·kg^-1 while that of RDX is -4.89 μC·kg^-1. Electrostatic accumulation changes from 0.35-0.50 μC·kg^-1 to 0.70^-1.20 μC·kg^-1 with the proportion of Al powder increasing from 20% to 30%. The electrostatic accumulation of RDX/Al composite explosive increases from 0.50 μC·kg^-1 to 1.20-1.50 μC·kg^-1 after addition 3%-8% organic solvents, such as petroleum ether and ethyl acetate.