The sol-gel technique is used to study synthesis of lithium-lanthanum titanate Li 3x La 2/3 -x TiO 3 (x = 0.167 and 0.11) using water-soluble salts of LiNO 3 · 3H 2 O, La 2 O 3 and a citrate Ti(IV) complex. This process allows obtaining single-phase crystalline compounds of Li 0.5 La 0.5 TiO 3 and Li 0.33 La 0.56 TiO 3 with a perovskite structure after precursor sintering at 1000°C. The synthesized Li 3x La 2/3 -x TiO 3 powders are described using the methods of XRD, DTA/TG, and SEM microscopy. Conductivity of Li 3x La 2/3 -x TiO 3 by the Li + ion is determined using the impedance spectrometry technique in the range of 1-2 × 10 6 Hz and is 8 × 10 -4 S/cm at the room temperature. The temperature dependence is studied and the activation energy of ion conductivity of Li 0.33 La 0.56 TiO 3 is studied in the range of 25-200°C.