【正文】 and its processing have bee one of pillar and driving force of mankind progress. In pace with multi polar petition in current world and people’s striving perseveringly for happier life ,material function goes beyond unceasingly men’s knowledge and imagination ,for example ,cryptic function material ,semiconductor material ,energy material ,vibration absorptive material , super strength aluminum alloy accounting for 70 percent of application of aeronautics and space ,metal foil of 4～5μm ,deep drawing plate with anisotropy below 1 percent ,electronic aluminum foil with micro orientation up to 95 percent ,heat resisting aluminum alloy with super strong specific strength used in aeronautics ,space and deep sea ,etc. Thus several important development trends with distinct time features in material processing domain are shaped up as follows : (1) Creating material processing machine with extraordinary physical field for processing material with special texture structures and functions. For example ,applications of thermal energy and mechanical energy are breaking through unceasingly technology limit ,and some non tradition energy ,such as microwave ,chemical energy , bioenergy , etc. , are introduced into material processing procedure one after another ,so that some material processing machines with extraordinary energy circumstance are produced. (2) Breaking through traditional physical limits and integrating melting ,solidifying ,plastic deformation and heat treatment to obtain special function of material and cut down expenses[3 ] . For example ,near net shaping material processing technology , such as fast rolling , spraying deposition ,over plastic molding , injection molding , high energy beam ,etc ,is applied. (3) Material processing process is forged ahead in the direction of high speed ,heavy duty and high accuracy online control ,for instance , the rolling speed goes up to 130 m extraordinary physical field。New Trends and Problems in Material Processing Machine Design Theory Abstract : Based on reviewing the historical background, prospecting for the development trend ,analyzing the plicacy and mechanism and summing up some achievements and experiences in scientific research , several new problems and the possible direction of development in material processing technology and machine are proposed ,such as ,producing new concept materials possessing some specific and extraovdinary properties by means of integrating and coalescing conelative frontier science and technology 。and thereafter a brief discussion is given.Keywords: interface。 procession machine 。s 1 ,the deformation pressure rises up to 300 MPa ,accuracy of dimension up to ,accuracy of shape up to 0. 1 I ,strength accuracy es up to MPa. For these reasons ,it is necessary for material processing machine design theory to integrate and coalesce ingeniously correlative frontier science and technology to create and produce some new concept material processing machine with following functions.2　Due Functions of New Concept Material Processing Machine (1) To have the ability to produce and bear extraordinary physical field and transmit extraordinary energy flow with the aim of providing extraordinary physical circumstances necessary for new concept material processing. For example ,high gradient temperature field with the speed of cool down of work interface which exceeds 104～106 Kand under certain circumstances ,the constraints may be destroyed or mismatched instantaneously and thus dynamic instability is resulted in. Thus following problems can be put forward : Mechanism of“spectre chatter”arose from sticking sliding friction and partial hydrodynamic lubrication in rolling interface , instability condition and mechanism of constraint between smooth surface and rotating body under the circumstance of high speed ,heavy duty and boundary lubrication , Lubrication film absorption mechanism and physical chemistry behaviour of interface of unceasingly regenerative surface ,the relationship between rheological characteristic and machine operation parameters.3. 3 Multi Body Non Linear Contact Mechanism Under the Condition of Extra High Pressure FieldTo build the super strength pressure field on large area is one of basic function of material processing machine , and it is also necessary to form by once large size structure element (such as spacecraft , intercontinental vehicles ,car and large scale aeroplane etc) . The ability to build super strong pressure field is one of important