Abstract: In order to explore the dynamic characteristics of rock burst roadway filled composite concrete, the dynamic mechanical properties of pure concrete and composite structure concrete under impact load were studied by using SHPB technology with a section of 75 mm. The results show that the stress attenuation on the left and right sides of foamed concrete in composite structure concrete is 1/5 of the original stress attenuation, and the stress peak on the right side of composite sample is only 1/5 of the stress peak on the left side, the stress attenuation effect of composite structure concrete is very good, and the stress attenuation of composite structure mainly depends on the mechanical properties of soft material specimen 2.