CISDI was responsible for the process design of whole line and package supply from exit of reheating furnace to collection end of cooling bed. From then on, the heavy bar main equipment can be manufactured completely in China, and CISDI has brought about upswing of development and integration of core and supporting equipment for Ф350mm heavy bar mill, which had been dominated by overseas companies. CISDI’s breakdown mill is designed with maximal diameter of 1,350mm rolls, largest in domestic similar bar mills. CISDI-initiated anti-reverse technology in the BDM automatic rolling filled in the blank in this regard in China. CISDI-developed new-style short-stress path mill offered an effective guarantee on final product’s high dimensional precision.