The Precipitation behavior of Al-Li-X(=Ti, Zr) alloys produced by a rapid solidification process and heat treated in the temperature range of 160℃ to 240℃ was investigated. The solid solubilty If Li atoms was shown to extend to 4.95w/o. The discontinuous precipitation reaction resulted from the preferential growth of δ´ phase. Also, the driving force of the growth was depend on the fluctuations of solute concentration. The coarsening rate of δ´phase followed a (time)＾(⅓) dependency obeys the MLSW theory. The addition of Ti or Zr had a little effects on the formation amount better than the growth rate of δ´phase.