Abstract: Characteristics of water consumption by transpiration of Zenia insignis at seedling stage were studied by using pot seedling in different weather and water conditions.The results showed that the diumal variation of water consumption rate by transpiration of Zenia insignis showed single-peak curve.Water consumption rate of the current-year seedlings was higher than annual stubble seedlings.The largest water consumption rate of the current-year seedlings occured at 12:00—16:00 in sunny,but occured at 12:00—14:00 in cloudy.However,the annual stubble seedlings occured at 10:00—14:00 in sunny,occured at 10:00—12:00 in cloudy.Under water controlling,the permanent wilting coefficient of the current-year seedlings was 7.83%,annual stubble seedlings was 5.95%.When soil moisture was less than 6.03%,the current-year seedlings would die.When it was 3.32%,the annual stubble seedlings would languish permanently,even to die.