Megacraspedus astemphella is a moth of the Gelechiidae family. It was described by Meyrick in 1904. It is found in Australia, where it has been recorded from Western Australia and South Australia. The wingspan is 9-11 mm. The forewings are fuscous, irrorated with blackish-fuscous and with a broad shining white costal streak from the base to the middle, then leaving the costa and narrowed to three-fourths. The stigmata are blackish-fuscous, irregular and sometimes dash-like, the plical very obliquely beyond the first discal. There are usually some undefined spots of whitish suffusion towards the costa posteriorly and at the termen. The hindwings are grey.