Con-rod boring machine has good performance, better structure, easy operation and high accuracy and can meet customer's demand. The machine is mainly used in boring rod bushing hole (rod bushing and copper bush) of diesel and gasoline engine of automobiles and tractors. In case of necessity, rod bushing seat hole can be fine-bored. The rough and fine boring processing for the holes on other parts can be also completed after changing the corresponding clamps. Besides, it has the accessories for centering sectifying tools, boring tools and micro-adjustment tools holder etc.