Trade early warning system

The utility model discloses a trade early warning system sets up on first car, include: laser scanning sensor, well accuse treater and display, laser scanning sensor settings is on the luggage -boot lid of first car, and the laser scanning sensor is connected with well accuse treater and display electricity respectively, the laser scanning sensor be used for acquireing and the second car in the first adjacent lane of car between distance information and relative velocity information to show through the display distance information and relative velocity information. The utility model discloses a trade early warning system with laser scanning sensor settings on the luggage -boot lid, can avoid among the prior art bumper department set up the radar and the bumper fracture that leads to the fact with the rupture and result in the bumper to the problem that pedestrian's guard action reduces, strengthened the guard action of bumper to the pedestrian.