The recirculation being paid attention in the geothermal exploitation can effectively protect the valuable geothermal resources. Recirculation effects are good in bedrock fracture geothermal exploitation in Tianjin, but not in Guantao formation, on which the pertinence study is made. The paper introduces the perforating technology in well completion, stable non-pressure recirculation volume reaches to 101m3/h with water taking effect being ensured at the same time.