Abstract: Disclosed herein is a composite current collector, a manufacturing method thereof, an electrode and a lithium-ion battery comprising the composite current collector. The composite current collector comprises: a first porous conductive sheet, a substrate sheet, and a second porous conductive sheet that are laminated in sequence, and the first porous conductive sheet and the second porous conductive sheet comprise amorphous micropores throughout the porous conductive sheets, the substrate sheet is made of a high molecular non-conductive material, and the first porous conductive sheet and the second porous conductive sheet are in conduction with each other in the electrode tab area.