Oreta trispina is a moth in the Drepanidae family. It was described by Watson in 1967. It is found in China (Shaanxi, Ningxia, Gansu, Sichuan). The length of the forewings is 18.5-23.5 mm for males and 22.5-25 mm for females. The ground colour of the forewings is either entirely reddish brown, or reddish brown with a pale yellow band on the forewings and a broad, distal, pale yellow area on the hindwings. The wing markings are mostly dark brown or black, with a yellow distal edge to the oblique postmedial fascia on the forewings and a yellowish brown cell-patch on the forewings.