The temperature dependence of the linewidth of the 7Li NMR spectrum line of LISICON crystals with different compositions and orientations has been investigated from 124 to 480k. It was found that there are three transition points of Li+ ion motion at ～273 K, ～350 K (for polycrystal ～320 K) and ～400 K respectively. The special behaviour of the electric quadrupole effects has been observed and discussed.