The optimal geometry of the working part of the cutting tool has an important influence on aspects such as high quality parts processing，improvement of production efficiency and the longer tool life in the cutting process. The geometric structure of index-able inserts (such as: the insert profile，the insert’s thickness T h ，the tool radius r and the types of the chip breaking groove and so on) and the integrated geometric structure of cutter body (such as: the working angle and the fastening way) were analyzed in this paper，then the structural design engineering technique of high performance index-able turning tool was put forward. This conclusion serves as both data and technical support for the design of new index-able tools.