Experiment is done to make potential prediction of air pollution in Liaoning Province with non-hydrostatic mesoscale model (MM5V2) with increased levels near the ground. The T106L19 output is used as initial field and lateral boundary condition. According to American method, the potentiality of air pollution is predicted by means of judging the mixing layer height and the mixing layer average wind speed near the ground. The observation data of SO₂ is used to check the prediction.