Allium cyathophorum is a Chinese species of onions in the amaryllis family. It grows at elevations of 2700–4600 m.

Allium cyathophorum has thick roots but thin, fibrous bulbs. Scapes are usually 2-angled, up to 15 cm tall. Leaves are flat, narrowly linear, usually shorter than the scapes. Umbels are hemispheric with purple flowers.