The La3+-loaded adsorbent was prepared by the reaction between La3+ and ethanolamine-modified vegetable tannic extract, to treat Fˉ wree solved. When other conditions were not changed, pH, temperature, stirring time, and dose were changed respectively and the adsorbance was tested respectively. Theresults show that this adsorbent possesses high saturted adsorptive capacity (18.80mg·g-1) when pH is 5～6, T≤80℃, 0.2g dosage, and 180min agitating time, and the adsorbance reaches the highest (98.5). The adsorbent can be easily regenerated with 0.5mol·L-1 NaOH at pH 12.