Abstract: What is the disruptive innovation model of integrated circuit industry under the background of digital technology?Systematic research of existing theories are still blank.To make up for the gap,based on the theory of disruptive innovation,systematically integrate the literature of digital technology,the theory of industrial technology track and the theory of business model innovation,through the exploratory case study of Obit and Lexin.Firstly,define the concept of disruptive innovation of integrated circuit industry under the background of digital technology,and then bring about three research achievements as follows:①explain the internal mechanism of "spiral isomorphic rise" matching between digital technology innovation track and integrated circuit industry technology track,propose"double track matching structure";②reveal the "spiral iterative ascent" mechanism of business model innovation, propose "value closed cycle system";③clarify the action mechanism between "double track matching structure" and "value closed cycle system",construct "spiral isomorphism iterative ascent" of China's integrated circuit industry disruptive innovation model under the background of digital technology.