Li contents and isotopic compositions of minerals in the peridotite xenoliths hosted by Cenozoic basalts from Penglai, Shandong Province are measured using ion probe. The results show that the Li abundance ranges from 2.0×10^-6 to 10.4×10^-6, 2.8×10^-6 to 23.8×10^-6 and 3.3×10^-6 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.