Abstract:The pressure on Chinese manufacturing from America improve the urgency of breaking through the technical short boards. In order to find out the key point of technical short board breakthrough, an evaluation method of manufacturing technology short board was designed, which includes three first level indicators and six second level indicators, a quantitative evaluation and analysis of 247 technical short boards involved in 10 key areas of China"s manufacturing industry was made. According to the quantitative score. 25 core short boards was found, chips, aviation gas turbines and genes breeding was judged as major short board group. According to the development distance between two countries, the major short board group is easy to be stuck but not destroyed, and their technology has common characteristics such as of deep foundation, strong coupling and high reliability, according them, suggestions for improving short board are put forward.