Emergency car arrester for laying running rail on subway track

The utility model relates to an emergency car arrester for laying a running rail on a subway track. The emergency car arrester comprises a connecting assembly, a first locking piece, a second locking piece and a blocking piece. The connecting assembly is provided with a fastening cavity used for containing the rail. A first locking piece is in threaded connection with the connecting assembly, and one end of the first locking piece extends into the fastening cavity and is used for abutting against one side of the track in the fastening cavity; a second locking piece is in threaded connection with the connecting assembly, and one end of the second locking piece extends into the fastening cavity and is used for abutting against the other side of the track in the fastening cavity; the blocking piece is fixedly connected with the connecting assembly. The end portion of the track is contained in the fastening cavity of the connecting assembly, the first locking piece and the second locking piece abut against the tw