Abstract: The height of terminal buds, leave area and induction of adventitious roots of Ginhgo biloba were studied by adding of different concentration rare earth [La(NO3)3] in mediums of MS0 and 1/2 MS+0. 5 mg/L IBA. The results are as follows: Although the effect of rare earth on height of shoot was not significant, it could clearly increase area of leaves. Among five cultivars, cultivar No. 44 had the highest induction rate (33.3%) of adventitious roots in medium of 1/2 MS-k0.5 mg/L IBA. Not only the rates of adventitious roots vcere significantly increased, but also rooting time was 7 days earlier than that of when adding of 0.5～5.0 mg/L of rare earth in mediums of 1/2 MS+0.5 mg/L IBA. The highest rate of rooting of eultivar No. 79 was up to 66.7%. The high concentration (10～20 mg/L) of rare earth decreased the rate of rooting or restrained root formation.