Abstract: In order to further determine the dynamic mechanical behavior of carbon fiber reinforced polymer（CFRP） under impact loading, the static/dynamic mechanical properties of CFRP composite with stacking sequence -45°/90°/45°/0° in thickness and in-plane direction were investigated using an electronic universal testing machine and a split-Hopkinson pressure bar（SHPB） test device. Results showed that the CFRP were failed mainly in brittle mode, and the fiber layers in different directions were entangled with each other, which can effectively support the matrix and avoided the instantaneous collapse failure of the material. Due to the relationship between the microcrack propagation and the loading rates, the strain rate effect of the composite was obviously positive correlation. Although different fiber layers were added, failure of the composite was still mainly controlled by the matrix material. Loading along the thickness direction, the cracks mainly spread along the 45° angle of shear failure, and many fibers were pulled out and fractured under the shear stress loading. Along the in-plane loading direction, the bonding layer between the fibers was brittle fracture, and the fibers with the same loading direction were buckling and unstable, and cracks penetrated the fiber layer and then cause delamination.