TY450 beam conveying vehicle is applicable for the overall transportation and erection of 20m, 24m and 32m single-line single-girder or double-line double-girder in the dedicated intercity railway passenger lines below 250km/h. The beam conveying vehicle can transport the concrete box girder from the prefabrication yard via the channel, railway subgrade, bridge girder (including steel-structure continuous girder, steel structure combined continuous girder etc.) and culvert to the erection position, and can finish the girder erection in combination with the bridge girder erection machine. The  beam conveying vehicle can transport the bridge girder erection machine to realize short-distance transfer between the bridges, and can transport  the bridge girder erection machine to pass the double-line tunnel of the dedicated railway passenger line.