Abstract: The tandem skew rolling is a new type of seamless steel pipe production process, featuring piercing and rolling on one equipment.Introduced here are the structure of the tandem skew rolling equipment, the characteristics and flow of the process, as well as its difference from the traditional pipe rolling process.Also described are the tests and study made on the experimental tandem skew rolling mill.The advantages of this process lie in the features such as only one equipment is needed for piercing and rolling, short process flow, high efficiency, energy-saving and environmental friendly, less investment and low cost etc.The tests indicate that this process is practical and has competitive advantages for processing metals which are difficult to deform.