Helcystogramma flavilineolella is a moth in the Gelechiidae family. It was described by Ponomarenko in 1998. It is found in south-eastern Siberia and China (Henan, Liaoning, Shaanxi, Sichuan, Zhejiang). The wingspan is 13-16 mm. The forewings are greyish-brown, with the costal margin, from the base to three-fourths of its length, and veins light-yellow, without spots. The hindwings are brownish-grey, darker towards the apex.