Soil moisture content and dry density detection device and detection method thereof

The invention discloses a soil moisture content and dry density detection device and a detection method thereof. Comprising an FDR sensor, a fixing system, a lifting detection system, an operation display system and a cutting ring method test system. The fixing system is composed of a base, a supporting platform and a supporting screw. The lifting detection system is composed of a motor, a lifting transmission device, a lifting screw and an FDR sensor. The motor is in driving connection with the lifting transmission device, the lifting transmission device is fixed above the supporting platform and is in driving connection with the lifting screw through a through hole in the center of the supporting platform to achieve lifting, the FDR sensor is fixed to the bottom of the lifting screw, and the probe is located vertically above a detection through hole in the center of the base. The control motor is used for driving the probe to be inserted into the soil body, field soil body parameters such as the volumetric