The landslide survey in Wushan Erlangmiao Transmigrant Village in Chongqing is one of transmigrant projects in Three Gorges Reservoir Area. The strata within the area are quite complex. Using the traditional drilling methods could not get the landslide investigation goals. While the double core barrel and SM glue mud came out of good results with increasing monthly drilling rate of 150 m to 350 m, core recovery of 85%~90%. The samples from broken rock belts, soft and weak interlayers, slide faces， and clay gravel can be take out by the method.