Abstract: Analyzed are the problems exist in the production of the conventional Φ325 Assel pipe rolling mill. Then introduced are the innovations of the process techniques of the Φ325 mm Assel mill, mainly focusing on the rolling process route, mandrel pre-insertion and mini circulation, as well as the rolling type.The quality of the product made by the innovated process is compared with that of the conventional process.The application result demonstrates that the innovated process has fixed the disadvantages of the conventional production process and can produce products with excellent quality while saving approximately 30%of the operation cost.