The Hedychium Koen. genus, containing 50 plants, belongs to the Zingiberaceae family, which are widely distributed in southern China. The flowers of Hedychium genus are beautiful so that they are cultivated in the gardens as horticultural plants, and some of them are used as herbal medicines. In recent years, scholars have been deepening their research on the Hedychium genus. It has been found that plants of Hedychium genus contain volatile oils, sesquiterpenoids, diterpenoids, diphenylheptanes, steroids, and flavonoids, which present the bioactivities of anti-inflammatory, antibacterial, and antioxidant. Hence, we summarized the chemical constituents and bioactivities of Hedychium plants in this paper and aimed to lay the foundation of further study of Hedychium plants.