To study the generation and the accele ration mechanisms of high energy ions in the interaction of ultra-short ultra- intense laser with solid targets,high energy ions behavior at the normal direc tion of the rear surface of the target produced from ulintencity pulse laser irradiated Cu thin f ilm solid targets is explored on SILEX-I laser facility.The solid nuclear detector CR39and Thomson spectrum ar e used to detect the energy spectra of protons and carbon ions,and the protons and C⁴⁺,C 3+,C²⁺,C¹⁺ ions are osderved.The results show that the ions are emitted from the normal direction of target-back and the ion s have a certain cut-off energy;the protons and C⁴⁺,C³⁺,C²⁺,C¹⁺ ions cut-off energy values are sepa rately 1221keV,1941keV,1899keV,624keV,and 422keV;the carbon ions beam current is increased with carbon ions charge number ;the yield of proton is far higher than carbon ions.High-energy ion generation and acceleration are the result of a variety of mechanisms where the electrostatic field TNSA acceleration mechanism is dominant.