Traffic safety facility foundation pit detection device

The utility model relates to the technical field of building construction equipment, and provides a traffic safety facility foundation pit detection device which comprises a first connecting plate, a connecting column is fixedly installed at the center of the bottom of the first connecting plate, a rotating shaft is movably embedded in the center of the interior of the first connecting plate, and a crank is fixedly installed at the top of the rotating shaft. A screw rod is fixedly connected to the position, located at the center of the interior of the connecting column, of the bottom of the rotating shaft, the outer surface of the bottom of the screw rod is movably sleeved with a first sliding block, and three first sliding grooves are formed in the connecting column. The supporting columns on the outer side and the universal wheels installed at the bottoms of the supporting columns can synchronously move outwards through the linkage structures, then the coverage range of the three universal wheels is increas