In order to calculate surface subsidence value, oblique deformation value, curvature deformation value and horizontal deformation value after mining S-1231 working face, probability integral method and the software developed by probabilistic integration method were used to calculate surface deformation after mining. The calculation results were compared with protection standards in "three down" regulations, which showed that the ground building would be damaged by secondary damage specified in the procedure after mining,, and the building needed to be repaired before its usage.