Abstract: The technology of side-on shadowgraph was developed to study the velocity of metal flyer driven by laser. The system of flyer experiment，the calibration of time and space axis of streak camera were introduced in the paper. With the laser of 248 nm wavelength, 28 ns pulse duration at laser energy of 100 J and laser intensity of 1.8×10¹²W/cm², the 5 μm aluminum flyer with 50 μm ablation layer was accelerated to 10 km/s. The difference of accelerated process in different conditions was discussed and the effect of shock wave in flyer accelerated process was also analyzed in the paper. Through the comparison of Al and Ta experiment results, it is revealed that the energy conversion efficiency of laser material interaction is different for different materials.