Marking fence blocking device for expressway construction and use method of marking fence blocking device

The invention discloses a marking fence blocking device for expressway construction and a using method of the marking fence blocking device. The marking fence blocking device comprises a blocking plate body and a base arranged at the bottom of the blocking plate body; laser indicating mechanisms are arranged on the two sides of the front end and the rear end of the blocking plate body, a first threaded rod and a second threaded rod are installed in each laser indicating mechanism, and threads on the outer surface of the first threaded rod and threads on the outer surface of the second threaded rod are oppositely arranged; a inclined supporting device is arranged on the inner side of the laser indicating mechanism, and a supporting main rod is installed in the inclined supporting device; sliding cavities are formed in the two sides of the interior of the base, and balance adjusting devices are installed in the middles of the sliding cavities; a element box comprises a gyroscope chip, a single-chip microcompute