The invention discloses a welding strip laying mechanism for cells and a solar cell welding machine. The welding strip laying mechanism comprises a conveying device, an inter-cell welding strip layingdevice and an inter-string welding strip laying device. The conveying device is provided with a laying section located at a welding strip laying station and used for carrying cell sets. The conveyingdevice is used for conveying the cell sets from front to back. The inter-cell welding strip laying device is used for conveying a plurality of inter-cell welding strips extending front and back to the laying section so that the inter-cell welding strips can be horizontally laid on the laying section at intervals and can be correspondingly arranged between the front cell set and the rear cell setin an overlap joint mode. The inter-string welding strip laying device is used for conveying inter-string welding strips extending in the horizontal direction to the laying section so that the inter-string welding strips can be correspondingly arranged between the cells of the cell sets in an overlap joint mode. By adoption of the welding strip laying mechanism, inter-cell welding strips and inter-string welding strips between connected boards can be automatically laid, and the production efficiency of solar cell panels is improved.