The utility model relates to an emergent cutting device of conticaster casting blank sets up in the terminal transportation roller way department of conticaster, including mounting bracket (1), movable cross beam (2), flame cutting machine (3), transportation roller way is spaned in mounting bracket (1), and movable cross beam (2) are installed on mounting bracket (1) and can be along the transport direction reciprocating displacement of casting blank, flame cutting machine (3) are hung and are established on movable cross beam and can transport under the state that keeps unanimous with the casting blank in movable cross beam's displacement speed, direction along the horizontal reciprocating displacement of movable cross beam, cut casting blank in transit through flame cutting machine. Theutility model discloses a to the continuous cutting of casting blank, what the guarantee continuous casting was produced goes on in succession.