采用微机控制激光散斑干涉技术，原位研究了结构钢单边缺口预裂纹试样在３．５％Ｎａｄ水溶液中，－１４００ｍＶ（ＳＣＥ）电位下阴极完氢６小时前后，裂尖材料形变行为的变化。同时，还对充氢与未充氢条件下光滑圆柱试样的应力－应变行为进行了对比研究，用扫描电镜观察了断口形貌。结果表明：由于氢的进入，使材料的加工硬化程度加剧，从而导致了变形困难。 In this paper, the deformation behavior of the crack tip material in a 3.5% Nad aqueous solution and at a potential of -1400 mV (SCE) at 6 SCH for 6 hours was studied by means of computer controlled laser speckle interference technique. The change. At the same time, the stress-strain behavior of smooth cylindrical specimens with and without hydrogen charging was also studied. The morphology of the fracture surface was observed by SEM. The results show that due to the entry of hydrogen, the degree of work hardening of the material is exacerbated, which leads to the difficulty of deformation.