Based on a sample of Shenzhen and Shanghai Exchange in 2007-2017, this paper examines the effect of institutional investor ownership on corporate cash holding. We establish the fixed effects model to study the relationship between them, and we use robustness checks and derive our results also have the robustness. Moreover, we do the heterogeneity analysis and find the impact of institutional investor ownership on corporate cash holding is more pronounced in firms with non-state-owned and non-Big 4 auditings. Therefore, the empirical results show that the high institutional ownership improves the level of corporate cash holding and this positive effect is more pronounced in non-state-owned enterprises and firms with low audit quality.