Empty and full sliver can exchange system of roving frame

The empty and full sliver can exchange system of the roving frame comprises a two-way transverse conveying chain and a plurality of one-way transverse conveying chains which are arranged on one side of the roving frame and further comprises two longitudinal conveying chains, and the two-way transverse conveying chain and the one-way transverse conveying chains are all communicated with the longitudinal conveying chains. The device has the advantages that when empty sliver cans and full sliver cans need to be exchanged, the empty sliver cans and the full sliver cans can be rapidly exchanged, the full sliver cans can be directly placed without waiting for all the empty sliver cans to be moved out, and if workers need to splice drawn sliver rings in the sliver cans, the working efficiency is greatly improved. The roving frame can stand on the flat plate at any time and walk to the corresponding sliver cans for operation, and can walk to the sliver cans without waiting for the conveying device to stop working, so