Abstract: In order to effectively solve the security risk from energy extraction of high saturation fluency materials such as Yb-doped materials, a noval time-multiplexing amplification technology is given. By lasers polarization characteristics and the free space propagation delay, laser pulse serials with various pulse parameters is obtained and the experiment is carried out. Comparing time-multiplexing amplification with single-pulse amplification, it indicates that the gain has no significant difference. For our laser fluency, subpulse interval from 14 ns to 22 ns has little influence on laser gain. It fully illustrates that when keeping certain total laser fluency, time-multiplexing amplification can reduce the subpulses fluency and the risk of optical element. So the storage energy can be effectively extracted.