The invention provides a method for splicing and assembling thin film solar cell components, which includes: leading a bottom layer covering film and continuously outputting the bottom layer covering film to a heated transmission surface; leading a plurality of cell strips and successively outputting the cell strips to the bottom layer covering film, wherein each of the cell strips has a conductive front face and a back face which is opposite to the front face, stitching a first cell strip with the bottom layer covering film and subsequently lapping each two adjacent cell strips in parallel; continuously dotting conductive glue on lapping region; pressing the cell strips after the adjacent cell strips is lapped for stitching the strips and the bottom layer covering film; coiling components of the strips and the bottom layer covering film. The invention also provides a device for splicing and assembling thin film solar cell components and thin film solar cell components spliced by the device.