Flying shear head blocking and cutting device

The invention discloses a flying shear head blocking and cutting device which is installed at the position of an inlet horn mouth of a running groove after rolling piece head cutting is conducted through a second flying shear, and a blank head hopper is arranged below the inlet horn mouth. Comprising a blocking and cutting head body, and the blocking and cutting head body comprises stand columns fixedly arranged on the two sides of a running groove correspondingly, and a first cross rod and a second cross rod which are arranged on the tops of the two stand columns correspondingly; the second cross rod is higher than the first cross rod, and the second cross rod is closer to the second flying shear in the horizontal direction; a baffle capable of swinging is hinged to the lower portion of the second transverse rod, the tail cutting length of a second shearing head can be reduced to 150 mm from original 250 mm, and the influence on the yield is reduced to 0.13% from 0.215%; meanwhile, the sheared steel head jus