Surattha diffusilinea is a moth in the family Crambidae.

It is found in Australia, where it has been recorded from New South Wales.

[1] The forewings are white, faintly tinged with rufous and slightly irrorated (sprinkled) with blackish.

The hindwings are white, faintly tinged with rufous.

This article relating to the moth tribe Ancylolomiini is a stub.