Laser indirect-drive has the potential to get ultra-high pressure which is very useful for shock physics. The sandwiched target is used to suppress the ionization effect which causes the blanking area in optical streak camera (OSC) in indirect-drive experiment. The blanking effect can be avoided by the time scale and the intensity. With the thick ablator, the blanking effect appears before the shock wave arrives at the transparent material. Then the blanking effect can be avoided in time scale. With the high Z material, the X-ray which causes the blanking effect can be blocked before the transparent material. For one shock experiment, the shock wave result in Al2O3 is achieved after using the thick ablator to stagger the blanking effect and shock wave signal. The shock wave result in quartz and polystyrene material is obtained after the block layer has been added to the ablator layer. The sandwiched target provides the technique support for the equation of state and shock timing experiment in indirect-drive.