Hydrodynamic dispersion theory studies the temperoral and spatial changes in groundwater soluble substances and predicts the trend of groundwater pollution. This article carried out a dispersion test in the new Huamei factory site of Baotou City, and measured the longitudinal dispersion degree of the shallow aquifer. The results showed that the longitudinal dispersion degree was 1.19~1.28 cm, the transverse dispersion degree experience value was 0.24~0.26 cm. It provides a sound basis for formulating effective measures to prevent and control groundwater pollution.