In order to explore the dynamic mechanical properties of coral aggregate concrete under impact loading, the split Hopkinson pressure bar(SHPB) test system was used to study the relationship between the dynamic strength increase factor and energy density and the strain rate of the concrete using coral reefs and sand as coarse and fine aggregates. Compared with ordinary sandstone concrete with the same strength grade, the results show that: the dynamic strength increase factor of coral aggregate concrete shows stronger sensitivity to the corresponding variability; the dynamic strength increase factor and the strain rate of the two types of concrete show logarithmic relation, the functional relationship shows a linear relationship between energy density and strain rate. Under the same strain rate conditions, coral aggregate concrete has higher ability for impact energy absorption, and the crushing degree is weaker than ordinary sandstone concrete, showing better impact resistance.