Provided is a method for constructing a
nucleic acid library. The method comprises: (a) providing a
nucleic acid molecule comprising a self-amplifying adapter, the self-amplifying adapter having a
palindromic sequence; (b) performing self-amplification on the
nucleic acid molecule to obtain the nucleic acid
library, wherein the self-amplification is realized by means of one or more cycles of a heating treatment and a cooling treatment, the
palindromic sequence of the self-amplifying adapter is adapted for forming a hairpin structure, and the hairpin structure is adapted for serving as a primer for self-amplification.