Recently, Ansteel Group Pansteel Company successfully developed D8 single-toothed caterpillar steel according to the standard requirements of US customer, finished batch production and sent such steel to the customer. This marks that another product in the company filled domestic gap and began to enter the market and the international popularity and market reputation of the product were further improved. D8 single-toothed caterpillar steel is used for manufacturing section products of heavy-duty bulldozer and is characterized by complicated cross-section shape, small tolerance and high accuracy indicator of cross section dimension. Therefore, it has many difficulties in research and development. During the technical R&D of new product for D8 single-toothed caterpillar steel, Ansteel Group Pansteel Company made full use of technical innovation advantages to successively tackle lots of technical problems, such as uneven section proportion and uncoordinated deformation, and finally successfully realized the batch production. The section dimension accuracy, profile and other indicators fully meet the requirement of the customer.