Chilo polychrysus, the Dark-headed striped borer, is a moth in the Crambidae family. It was described by Meyrick in 1932. It is found in India, Malaysia, Thailand, Laos, Vietnam and Indonesia. The wingspan is 16-25 mm. The wings are yellow brown with small dark spots. The larvae feed on Cyperaceae and Poaceae species, as well as Oryza sativa, Saccharum officinarum, Triticum species and Zea mays. They bore the stems of their host plant.