Drought result in water level fluctuating led to large area lakeshore of wetland degenerate and disappear, the effects on wetland plants and communities had become one of the research hotspot in recent years,but the study on the growth(heights,relative growth rate,diameter,branches,relative moisture content)and resistance(the con-tents of MDA and proline)of Scirpus tabernaemontani that came from ground water level was zero(experimental group),compared with the S.tabernaemontani grew in normal water environment(control group,flooding about 20 cm),so as to reveal the impacts of S.tabernaemontani growth to zero ground water level(drought).The relative growth rate of S.tabernaemontani varied in different periods,the experimental group and control group were 2.00 cm·d~(-1) and 3.18 cm·d~(-1) in May,2.35 cm·d~(-1) and 2.44 cm·d~(-1) in early June,0.95 cm·d~(-1) and 0.99 cm·d~(-1) inlate June,0.02 cm·d~(-1) and 0.05 cm·d~(-1) after July respectively.The average number of branches of experimental group was 2.94 branches per plexus and control group was 4.86 branches per plexus.The diameter of experimental group was 5.15 mm and the control group was 7.33 mm.The relative moisture content of S.Tabernaemontani was 73.28% in experimental group and 75.28% in control group.The average content of MDA in the experimental group was 10.27 mug·kg~(-1) and the control group was 6.46 mug·kg~(-1).The average value of proline content was 9.44 mumol· kg~(-1) in experimental group and the control group was 6.40 mumol·kg~(-1).These indexes differences were all significant except for relative moisture content between experimental group and control group(The control group was better than that of the experimental group),which showed that zero ground water level was not conducive to S.tabernaemon-tani s growth,would decrease the productivity of wetland ecosystem that was mainly S.tabernaemontani,and would accelerate this wetland ecosystem degradation succession.This article would provide scientific basis for revea-ling the serious effects on the growth of wetland aquatic plants and plateau wetland ecosystem result from climate chang(drought).