The present disclosure relates to an extremely deformable structure comprising a basic displacement unit having an embedded form, in which m polygonal basic unit cells are disposed adjacent to each other, m separation parts are formed among the m basic unit cells, a junction part connecting the basic unit cells to each other is formed between the basic unit cells in which the junction part has a junction part pattern in which an external junction part disposed at the outer portion of the basic unit cell and an internal junction part which is not in contact with the outer portion of the basic unit cell are sequentially repeated, and the relative positions of the m basic unit cells are changed according to the junction part pattern, and thus, are activated (here, m is an integer of 4 or 6). Further, the present disclosure relates to a lithium secondary battery made from the extremely deformable structure.