The friction properties of two types of polymer bonded explosive(PBX) coded P1,P2 and two coatings named C1,C2 were tested by the universal testing machine based friction system and the nano-indenter respectively. The results of friction properties obtained by the two methods are correlative. The friction coefficient of C1 coating is the highest among the four materials and the C2 coating is more close to P1 and P2. The friction test for four materials which were in the aging enviroment of 60 ℃ 80%RH have beend conducted. Results show that only the C1 coating′s friction becomes much higher among the four materials.