Field monitoring system and testing method for fracture state of anchor rod in surrounding rock

The invention discloses a field monitoring system and method for the fracture state of an anchor rod in surrounding rock. The monitoring system comprises the anchor rod, a corrugated pipe and a plastic positioning piece, the anchor rod is sleeved with the plastic positioning piece, the anchor rod is connected with the corrugated pipe through the plastic positioning piece, a first signal line penetrates through the corrugated pipe, the far end of the corrugated pipe is bent to form a hook and connected with the far end of the anchor rod through a connecting assembly, one end of the first signal line is connected with the far end face of the anchor rod, the center of the near end face of the anchor rod is connected with one end of a second signal line, and the anchor rod monitoring device is formed and inserted into a drill hole. The drill hole is filled with slurry, the other end of the first signal line and the other end of the second signal line are connected with a negative electrode and a positive electrod