This article introduces the Chinese Ideophone Database (CHIDEOD), an open-source dataset, which collects 4948 unique onomatopoeia and ideophones (mimetics, expressives) of Mandarin, as well as Middle Chinese and Old Chinese. These are analyzed according to a wide range of variables, e.g., description, frequency. Apart from an overview of these variables, we provide a tutorial that shows how the database can be accessed in different formats (.rds, .xlsx, .csv, R package and online app interface), and how the database can be used to explore skewed tonal distribution across Mandarin ideophones. Since CHIDEOD is a data repository, potential future research applications are discussed.