The present application relates to a transfer printing assembly, a solar cell, and a preparation method thereof. The transfer printing assembly includes a carrier and a first conducting wire. The carrier includes a first surface having a first groove. The first conducting wire is at least partially disposed within the first groove. The first conducting wire and a wall of the first groove define a first receiving cavity at a side of the first conducting wire adjacent to an opening of the first groove. The first receiving cavity is configured to accommodate slurry material. The first conducting wire is detachable from the first groove under an action of external energy.