A growing number of research projects have been conducted in the field of computer-assisted translation (CAT), such as translation memory, terminology management and project management. However, it is noticeable that few studies have focused on the efficiency influence of CAT software to English-Chinese technical translation. This paper aimed at exploring the influences of the CAT software on the efficiency of E-C technical translation, i.e. how the TM system of the Software influences the quality of technical translation. The findings of this study prove that the CAT software is useful to improve the speed and quality of E-C technical translation, and reduce the possibility of mistranslation and maintain the consistency of terms and style. Therefore, it is necessary to incorporate the CAT software into translation training curriculum