This study uses the quasi-experimental method to study the development of informatization teaching ability of pre-service English teachers. The two groups of samples of the research are the natural classes of pre-service English teachers. One is the experimental group and the other is the control group. After two pre-test and post-test questionnaires, the research problems will be solved through data collection and analysis: 1. To understand the current situation of English pre-service teachers' TPACK ability and the problems in the training process. 2. To identify the effects of Micro-Lesson Design on pre-service English teachers’ achievement in TPACK ability. The results of this study will increase the theoretical and practical contributions to improving the informatization ability of pre-service English teachers.