Under the various load combination of buildings, the deformation of foundation soil. The size of the deformation directly affects the safety of the buildings. Factors that affect the deformation is mainly the geological structure, such as moisture content, density, soil after being compressed volume smaller feature is the compressibility of soil. Geotechnical engineering is a direction of the development of the civil engineering specialty, test provide necessary parameters for building foundation engineering, geotechnical laboratory for cohesive soil consolidation experiment teaching, make students grasp to determine the quantitative relation between the deformation and load, compression curve and rebound curve drawing, it provide necessary theoretical basis for geological prospecting work, provide necessary parameters for building foundation design, closely integrated theory and practice..