Based on Chinese A share listed companies from 2007 to 2013, this paper examined the impact of external guarantee behavior on audit fees and audit opinion types. The results show that the external guarantee is significantly and positively related to audit fees. The greater amount of external guarantee, the higher the audit fees. Companies with high risk guarantee are more likely to be issued a modified audit opinion. The further study shows that the impact of external guarantee behavior on audit fees is stronger when enterprises are state owned. The effect on the audit fees for the external guarantee of the listed companies in the eastern coastal areas is much stronger than those of other areas.