The invention relates to a multifunctional cold rolling round steel bearing transportation rail car, and belongs to the technical field of round steel transportation packaging. The multifunctional cold rolling round steel bearing transportation rail car comprises a bottom plate, a gathering mechanism, an aligning mechanism and a plurality of packaging and threading mechanisms; a storage rack is fixed to the bottom plate, and the gathering mechanism is arranged on the storage rack; the packaging and threading mechanisms are erected on the bottom plate separately; end plates are fixed to the twoends of the bottom plate correspondingly and perpendicularly fixed to the bottom plate, and the aligning mechanism is arranged on any one end plate; multiple pairs of rolling wheels are arranged on the bottom plate; and an infrared polish rod switch and a counter are fixedly arranged on the side face of the storage rack. The multifunctional cold rolling round steel bearing transportation rail caris arranged on a discharging machine, round steel is directly discharged to the multifunctional cold rolling round steel bearing transportation rail car through the discharging machine, the processesof aligning, gathering and packaging are automatically completed, so that the labor intensity of workers is reduced, stations in the round steel packaging process are reduced, and the factory area occupied by packaging is decreased.