Tianjin's geothermal resources belong to the medium and low temperature hot water type in non-volcanic sedimentary basins. The water temperature is mostly between 30℃ and 90℃, with the characteristics of shallow burial and good water quality. Ten geothermal anomaly areas with exploration and development value have been discovered, covering an area of ​​2,434 square kilometers, with a total hot water reserve of 110.36 billion cubic meters, which is the largest medium and low temperature geothermal field in China so far.