Abstract: Experimental investigations were performed for amplification of ultrashort pulse laser with HeavenI ebeam pumped KrF amplifier in CIAE. A 50mJ, 420fs UV ultrashort pulse was amplified to 2-3J energy, 1.2ps pulse duration, and 2TW laser power. Experimental technique such as synchronization were describe, some parameters such as nonlinear absorb coefficient were measured in experiment. As a result, it is possible to achieve ultrastrong UV laser wih intensity higher than 1019W/cm2 in recently years．