The invention discloses a vehicle collision emergency alarm calling device, and relates to the technical field of intelligent traffic management. The device comprises an accident alarm system, the accident alarm system comprises an alarm base station, a signal repeater, a field alarm system, a remote controller and a monitoring center. The field alarm system comprises a plasma laser transmitter, a laser diffusion device, a projector, a control box and a fog screen machine, the plasma laser transmitter and the projector are installed at the arch crown of a tunnel portal, the laser diffusion device is installed at the head of the laser transmitter, the control box and the projector are electrically connected with the monitoring center, and the fog screen machine is laid along the secondary linings of the tunnel portal. Based on a Zigbee wireless communication networking technology, a series of wireless alarm base stations and a field alarm system outside the tunnel are arranged in the tunnel, a laser virtual wall is formed at the tunnel portal by adopting a laser technology, traffic accident image information in the tunnel is displayed on the virtual wall, vehicles outside the tunnel are warned not to enter the tunnel any more, and secondary accidents are prevented.