Unstable rock mass fracture monitoring device

The invention relates to the technical field of geological disaster prevention and control, in particular to an unstable rock mass fracture monitoring device which comprises a vertical rod and a solar panel assembly installed on the vertical rod and further comprises a monitoring mechanism arranged on the vertical rod. The monitoring mechanism comprises a mounting frame, a round rod, a clamping piece, an adjusting assembly, a limiting box, a gravity ball, a pressing switch and an early warning assembly. Through the arrangement of the monitoring mechanism, when the crack is expanded, the clamping piece can turn over to be separated from the crack of the rock mass and trigger the pressing switch, so that the early warning assembly is powered on to warn vehicles passing by the road and notify related personnel to further process the dangerous rock mass, and the early warning assembly is located beside the road, so that the overall maintenance cost is low; and meanwhile, vehicles coming and going on the road can