This paper investigates the impact of directors accounting firm experience on auditor choice decision made by Chinese A share listed companies during the period from 2010 to 2016. Our analysis finds that board of directors possessing greater levels of audit expertise members are associated with smaller size external auditors. When we segregate the type of directors between independent directors and non independent directors， we find that the negative impact identified is mainly driven by independent directors. Furthermore， when we separate companies between SOEs and non SOEs， we find the impact of audit experience is confined to non state owned companies. To elaborate the research， we further focus the directors audit expertise which is measured by 3 dimensions：whether they are employed by large audit firms， the highest position they reach， and the number of audit firms they have served. The results indicate that the more experienced the directors， the higher professional competence they have， the more likely the company is to select smaller size external auditors， which strongly supports the resource dependence theory.