The invention relates to a two-side coating, laminating and assembling device for a lithium battery manufacturing process. The device comprises a base material, a first traction roller unit, a dust removal device, a first coating assembly, a second traction roller unit, a third traction roller unit, a second coating assembly, a rolling device, a slicing device, a transfer device and a traction device, wherein the base material includes a first surface and a second surface; the first traction roller unit, the second traction roller unit and the third traction roller unit are rolled with the second surface; the base material passes through the second traction roller unit and the third traction roller unit and then turns over; and the base material sequentially penetrates through the dust removal device, the first coating assembly, the second coating assembly and the rolling device to finish two-side coating of the base material under the traction of the traction device, the first traction roller unit, the second traction roller unit and the third traction roller unit, and sequentially penetrates through the slicing device and the transfer device through the traction of the traction device at the tail end of the device to finish subsequent pole piece laminating and battery assembling procedures.