Abstract: Based on the geologic,mining and engineering geologic characteristics of the gob of Zhaibo coal mine under the freeway,the deformation characteristics of the ground and the stability of the gob are analyzed and evaluated quantitatively and qualitatively using FEM software. As a result, the deformation of the gob area under the freeway hasn’t been finished. The harm to the freeway being built will be made, and the relative measures must be taken.