Highway construction safety warning device

The utility model discloses a safety warning device for highway construction, and particularly relates to the field of warning equipment, the safety warning device comprises a supporting block, the top of the supporting block is fixedly connected with a sliding column, the front surface of the sliding column is provided with a sliding groove, and the front surface of the sliding column is provided with a warning plate capable of adjusting the height according to the horizontal height of a construction area. The whole device is moved to a proper position of a construction area, then the heights of a warning plate and a warning lamp on the whole device are adjusted according to the horizontal height of the position, a rotary knob is rotated to drive a rotating rod and a driving bevel gear to rotate, so that a driven bevel gear and a threaded rod are driven to rotate, and a sliding block is driven to move up and down; therefore, the warning board and the warning lamp are driven to move up and down. Therefore, dr