By using the double base propellant with hollow center,the outer diameter Φ45.5 mm,inner diameter Φ8.2 mm,the length 40 mm and the density 1.61 g·cm^-3,the distances between the initiating booster and sympathetic charge were set into a series of different clearances,and these gaps were filled with materials including air,water,sand,sawdust,flake of rubber and elastic gel with oxide. The effect of clearances and different fillers on new explosive detonation velocities and actions were studied. The results show that with 2 mm clearance filled with air,when the main charge is aroused,the sympathetic charge is equipped with detonation performance; with larger than 3 mm clearance filled with air,when the main charge is aroused,the sympathetic charge is not equipped with detonation performance; but after the same clearance are filled with other materials,the sympathetic charges are formed into steady detonation,and the latter detonation velocities are more than 6000 m·s^-1,and the A3 steel of 10 mm thick can be broken down.