New　lithium　fast　ion　conductors　of　perovskites-type　compounds　Li3xLa0.67-xInyTi1-2y　NbyO3　were　synthesized　and　their　crystal　structure　and　electrochemistry　behavior　were　characterized,　XRD　analysis　indicated　that　the　synthetics　were　pure　perovskites　solid　solution　in　the　composition　range　of　x　=　0.10,　y　<　0.050,　while　a　second　phase　that　In2O3　existed　at　x=0.10,　y　≥　0.050.　A.　C.　impedance　measurements　showed　their　highest　ionic　conductivity　was　5.81　×　10-4　S/cm　at　room　temperature　and　1.15　×　10-2/cm　at　523　K,　its　activation　energy　was　20-30　kJ/mol　in　the　range　from　room　temperation　to　523　K.　DC　polarizing　curver　illustrated　the　electrochemical　stability　of　the　synthetics　were　improve.