Compsolechia diplolychna is a moth of the Gelechiidae family. It was described by Meyrick in 1922. It is found in Brazil (Para). The wingspan is about 16 mm. The forewings are purple-blackish with a broad deep orange fascia about two-thirds, leaving the costal edge dark fuscous. There are deep metallic-blue pointed streaks from its posterior edge near the extremities rather converging and not reaching the anterior edge. The hindwings are blackish, with a thinly scaled white blotch in the disc before the middle.