Warning device for municipal construction

The utility model belongs to the technical field of warning, and particularly relates to a warning device for municipal construction. The device comprises a fixing rod, the fixing rod is sleeved with a first circular ring, a bearing is arranged between the first circular ring and the fixing rod, a first groove is formed in the outer side wall of the first circular ring, a second circular ring is arranged in the first groove, a fixing plate is arranged on the outer side of the second circular ring, and the fixing plate is fixed to the first circular ring through a connecting block. First connecting rods are vertically fixed to the outer side walls of the fixing plates, and a first connecting assembly is arranged between the two first connecting rods; second connecting rods are perpendicularly fixed to the outer side wall of the second circular ring, a second connecting assembly is arranged between the two second connecting rods, a warning board is arranged between every two adjacent fixing rods, and the warnin