Li contents and isotopic compositions of minerals in the peridotite xenoliths hosted by Cenozoic basalts from hemas-microsoft-com:office:smarttags" />Penglai, Shandong Province are measured using ion probe. The results show that the Li abundance ranges from 2.0 to 10.4×10^-6, 2.8 to 23.8×10^-6 and 3.3 to 59.7×10^-6 in olivine (ol), orthopyroxene (opx) and clinopyroxene (cpx), respectively, and the δ⁷ Li values varies from -28.6 ‰ to +0.5 ‰, -12.7 ‰ to +12.8‰ and -41.5 ‰ to +22.6 ‰ in ol, opx and cpx, respectively. Both the Li contents and isotopic ratios deviate strongly from the normal mantle range and the equilibrated trend.