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Recent progress in the field of interaction of high intensity laser and particle beam in our group is introduced.For ion acceleration,energetic proton beams are obtained in experiments with femtosecond high contrast PW laser.New methods for ion acceleration are introduced.Cascaded proton acceleration is discussed theoretically and it is shown 7 GeV protons can be generated in regime of wake field driven by PW LG pulse.Proton and positron acceleration driven by energetic proton beam is proposed as shown in Fig.1.