Roadbed compactness detection device and detection method thereof

The invention relates to the technical field of compaction degree detection, and discloses a roadbed compaction degree detection device and a detection method thereof.The roadbed compaction degree detection device comprises a detection vehicle body, the left side and the right side of the upper surface of the detection vehicle body are fixedly connected with two first vertical rods and two second vertical rods correspondingly, and sand filling assemblies are arranged between the first vertical rods and the second vertical rods; a first connecting plate is fixedly connected to the top end of the first vertical rod, a limiting assembly is arranged on the outer surface of the second vertical rod, a first air cylinder is installed on the first connecting plate, a first movable plate is fixedly connected to the telescopic end of the first air cylinder, and a base plate is arranged on the lower surface of the first movable plate through a rotating assembly. The drill bit moves to the through hole to dig a hole in a