The invention discloses a connecting block foldable type adjustable cable delivery disc which comprises a winding barrel as well as a plurality of electronic chain folding devices, wherein a cable is wound around the winding barrel; side brackets are respectively arranged at two ends of the winding barrel; the side brackets comprise outer rings and core part connecting blocks arranged inside core parts of the brackets, and the outer rings are connected with the core part connecting blocks through a plurality of support rods which are distributed in the circumferential directions of the outer ring; a plurality of diameter adjusting holes for adjusting the outer diameter of the winding barrel are formed at intervals in the support rods in the length directions of the support rods; the electronic chain folding devices are in one-to-one correspondence with folding rods; the electronic chain folding devices can drive corresponding folding rods to be folded or unfolded. By adoption of the connecting block foldable type adjustable cable delivery disc, an empty delivery disc can be rapidly folded, then the space occupied by the empty delivery disc can be reduced, the transportation cost of the empty delivery disc can be lowered, and cables can be prevented from being broken in the winding process.