Auditor choice is one of the most important issues in the field of auditing，accounting and economics.Using the data of Chinese A share listed companies from 2003 to 2014，this paper studies the impact of political corruption on the auditor choice，and investigates how the supply chain characteristics influence the former relationship.The results show that the firms in more corruptive areas are less likely to hire the high quality auditor，such as the Big 4 auditors.In addition，the negative association between political corruption and auditor choice is larger among the non SOEs than the SOEs.Furthermore，the supplier concentration and the customer concentration can both obviously mediate the negative association between corruption and auditor choice in the whole sample and the SOEs.However，they lost their magic in the non SOEs.Overall，the evidence is consistent with the hypothesis that the corruptive local officials can ruin the qualities of firms accounting information.