The invention discloses a packaging structure of a super-thin soft-package battery, comprising a battery cell, a PTC and a protective board; the PTC is directly fixed on the protective board, a contact sheet is fixedly arranged on the PTC, and the other end of the contact sheet is fixedly arranged on one lug of the battery cell, and insulation paper is fixedly arranged at the lug position of the battery. The packaging structure solves the problem that the thickness is heavy by adopting L-shaped rotary connection and leads the thickness of the battery to be thinnest; the insulation measure in the invention is simple, thereby not only improving the production efficiency of lines, but also eliminating the hidden trouble caused by the quality of the insulation paper; in addition, partial insulation gummed paper is cancelled and the cost is reduced; besides small packed PTC and the contact sheet, the product cost is reduced.