The sensor is suitable for the measurement of soil temperature and moisture. After comparison with the German original high-precision sensor and the calibration of the actual soil drying weighing method, the sensor has high accuracy, fast response and stable output. It is less affected by soil salinity and is suitable for various soil qualities. Can be buried in the soil for a long time, resistant to long-term electrolysis, corrosion resistance, vacuum potting, completely waterproof. The sensor is widely used in scientific experiments, water-saving irrigation, greenhouses, flowers and vegetables, grassland pastures, soil rapid measurement, plant cultivation, sewage treatment, grain storage, and the measurement of moisture and temperature of various particulate matter.