Deep soil body settlement monitoring system

The invention relates to a deep soil body settlement monitoring system. The deep soil body settlement monitoring system is characterized in that a vertical drill hole is formed in a place needing settlement monitoring, a drop hammer is placed at the bottom of the vertical drill hole, the drop hammer is connected through a first end of a thin line sleeved with a sleeve, and meanwhile, the thin lineis exposed out of the sleeve by a preset length. The sleeve is fixedly arranged relative to the vertical drill hole, so that the drop hammer drives the thin line to descend together when the deep soil body sinks, and the sleeve cannot move along with the drop hammer. When the deep soil body settles to a certain extent, the second end of the thin line and an alarm switch can generate action causedby power, and the alarm switch is switched from an off state to an on state to realize electrification, so that an alarm signal is output. The scheme can be realized only through simple devices, professional equipment such as