Bridge construction warning device

The utility model relates to the technical field of warning equipment accessory devices, in particular to a bridge construction warning device which can enable a warning letter strip to emit light androtate at the same time, so that the warning effect is better. Vehicles can be intercepted, so that the practicability is improved; the height of the device can be adjusted, so that the adaptabilityis improved; the warning device comprises two groups of warning character strips, the device further comprises a working box, a direct-current motor, a rotating shaft and a rotating disc, a working cavity is formed in the working box, and the device further comprises a square transparent plate, a lamp tube and a cover plate; two sets of alternating-current motors, two sets of transmission shafts and two sets of rotating plates are further included, communicating grooves are formed in the middles of the outer sides of the two sets of rotating plates in a communicating mode, and adjusting threads are arranged on the inne