Abstract: Utilizing the daily MODIS data,relative soil moisture data,composite meteorological drought index(Ci)in July and August from 2006 to 2010,it discussed the fitting method of dry edge and wet edge of NDVI-Ts feature space,set up the TVDI calculation models of each ten-day from July to August.According to the relative soil moisture data of 31 agricultural meteorological stations in Sichuan,it obtained the observed samples of five drought grade,through comparison of in-class scatter matrix,between-class scatter matrix,correlation with relative soil moisture and with Ci index of five kind simples,it analyzed the monitoring capacity of TVDI and VSWI methods to Sichuan midsummer drought.The result indicated:for the midsummer drought monitoring by remote sensing in Sichuan,using TVDI index monitoring was more appropriate and better effect than using VSWI index monitoring,TVDI index monitoring to arid area was more reliable.