Nanostructured thin films have drawn extensive attention because of their unique properties resulting from nanoscale features.One of the convenient ways to generate nanostructured thin films is to use patterns with nanoscale textures as templates for the reactions carrying out within the templates (i.e., the concept of nanoreactor).In this study, nanopatterns were obtained from the self-assembly of degradable block copolymers, polystyrene-b-poly (L-lactide) (PS-PLLA) with PLLA gyroid nanostructure, at which the PLLA block can be degenerated to form the nanopattems with bi-continuous nanopores.