Humidity sensing device for soil detection

The utility model provides a humidity sensing device for soil detection, and relates to the technical field of humidity sensing for soil detection. The device comprises a humidity sensor, a probe, a transmission line, a shell, a line pipe, a fixing plate and a pressing mechanism, the humidity sensor is fixedly installed in the shell placed in soil, one end of the probe penetrates through the shell and is installed on one side of the humidity sensor, and one end of the transmission line penetrates through the shell and is installed on the top of the humidity sensor. A probe and a humidity sensor are placed in a soil pit, then soil backfilling is carried out, the probe is prevented from being damaged due to the fact that the probe collides with stones when the probe is inserted into the wall of the pit, meanwhile, the soil backfilled above the probe is pressed downwards through a pressing plate, the backfilled soil is compacted to a certain degree, the probe can be tightly wrapped by the backfilled soil, and th