Cochylidia oblonga is a species of moth of the Tortricidae family. It is found in China (Anhui, Fujian, Gansu, Guangdong, Guangxi, Henan, Hubei, Hunan, Jiangxi, Liaoning, Tianjin). The wingspan is 9–12 millimetres (0.35–0.47 in) for males and 10–15 millimetres (0.39–0.59 in) for females. The ground colour of the forewings is yellowish white, the costal margin with a narrow brownish black stripe running from the base to the median fascia. The hindwings are pale grey.