The paper introduced the advantages of ground source heat pump and application of it in Tianjin, analyzed the applicability and made the analysis comparison on its economy. The paper also introduced the characteristics of shallow geothermal survey in Tianjin and some relative problems in borehole engineering, described hydrogeology condition in Tianjin, and analyzed how to deal with recirculation for ground source heat pump and damage to resistivity water layer between saline and fresh water layer.