Geological disaster crack measuring device

The utility model discloses a geological disaster crack measuring device which comprises a supporting transverse plate, a telescopic rod fixedly arranged at the center of the bottom end of the supporting transverse plate, a supporting mechanism arranged on the supporting transverse plate and an adjusting mechanism arranged on the telescopic rod. The supporting mechanism comprises hollow columns, supporting bearings, a rotating column, a rotating disc, a supporting screw rod, an underground cone, a limiting protrusion, a limiting circular ring and a supporting circular truncated cone, the two hollow columns are fixedly arranged at the bottom end of a supporting transverse plate and are close to the left end and the right end of the supporting transverse plate respectively, and the supporting bearings are fixedly arranged on the inner walls of the hollow columns; the adjusting mechanism comprises a sleeve, a locking screw, a limiting rod and a limiting disc, the sleeve is arranged around the peripheral side fac