Helcystogramma angustum is a moth in the Gelechiidae family. It was described by Li and Zhen in 2011. It is found in China (Guizhou, Hubei). The wingspan is 11.5–15 mm. The forewings are yellowish-brown to greyish-brown, with scattered dark brown scales. The basal two-thirds of the costal margin is dark brown and the distal third is yellow. The hindwings are grey.