Roadbed filling system

The invention discloses a roadbed filling system, and relates to the technical field of roadbed filling, the roadbed filling system comprises a casing, a sampling cavity with an opening at the rear end is arranged in the casing, two symmetrical detection cavities are arranged in the left end wall and the right end wall of the sampling cavity, and a detection mechanism, a sampling mechanism and a switching mechanism are arranged in the casing; through a detection cone which is arranged in the detection mechanism and can be inserted into the roadbed with a certain force and a graduated scale arranged on the detection cone, the compaction degree of the roadbed can be preliminarily detected according to the depth of the detection cone inserted into the roadbed, and through a connecting block which is arranged in the sampling mechanism and can move downwards and rotate, the compaction degree of the roadbed can be accurately detected. And a moving belt capable of moving the sampling barrel is arranged in the switch