Abstract: Concrete with nano-Fe₂O₃ (NF), double kinds of nanomaterials (nano-Fe₂O₃ and nano-CaCO₃, NFC), and three kinds of nanomaterials (nano-Fe₂O₃, nano-CaCO₃, nano-SiO₂, NFCS) all containing the addition of 2.0% (based on cement quality)were prepared, then the dynamic properties of three kinds of concrete were compared with the plain concrete (PC) under varied average strain rate levels by the 100 mm-diameter split Hopkinson pressure bar (SHPB) test device after a 28 d maintenance period. The results show that the addition of composite nanomaterials can effectively improve the compressive strength of concrete under quasi static load. Under impact load, NFC has the highest dynamic compressive strength at middle and low average strain rate, it is 31.6% higher than that of PC at 80 s^-1. Dynamic compressive strength of NF has an advantage at high level of average strain rate with 16% higher than that of PC at the average strain rate of 125 s^-1. Peak strain of NF has significant advantages under impact load, which verified good deformation performance; From the perspective of the evaluation index of specific energy absorption, NF increases by 66.6% and 75.7% than that of PC at the average strain rate of 75 s^-1and 125 s^-1. SEM photograph analysis shows that nano-Fe₂O₃ particles increases the compactness of cement stone, improves the strength and toughness of NF. Mercury injection test analysis show that nanoparticles CaCO₃ improve the pore structure of cement stone in concrete.