Caloptilia soyella is a moth of the Gracillariidae family. It is known from Cape Verde, China, Fiji, India, Indonesia (Java), Japan (Kyūshū, Honshū, Shikoku), Sri Lanka and Vietnam. The wingspan is 9-10.2 mm. The larvae feed on Cajanus cajan, Dolichos species, Glycine max, Kummerovia striana, Lespedeza cyrtobotrya, Phaseolus calcaratus, Phaseolus mungo, Pueraria candollei, Soya hispida, Vigna angularis, Vigna mungo and Vigna umbellata. They mine the leaves of their host plant.