In order to monitor the desertification of the three-north shelterbelt and Horqin sandy,the paper selected Wengniute county of Inner Mongolia as an experimental area and displaied the surface soil moisture by using Landsat TM remote sensing data.This paper adopted the thermal inertia method,temperature vegetation drought index method and the BP neural network method to display the surface soil moisture,all of the three algorithms can better reflect the spatial distribution trend of surface soil moisture.And...