Catopta dusii is a moth in the family Cossidae.

It is found in China (Sichuan), where it has been recorded at altitudes ranging from 1,150 to 3,000 meters.

The ground colour of the forewings is dark-grey with a lighter pattern in the discal and postdiscal areas.

The hindwings are uniform dark-grey with light-grey marginal border.

Adults have been recorded on wing from mid-July to early August.