Macrothyatira flavida is a moth in the family Drepanidae first described by Arthur Gardiner Butler in 1885. It is found in the Russian Far East (southern Sakhalin, southern Kuriles), Taiwan, Japan and China (Henan, Shaanxi, Ningxia, Gansu, Zhejiang, Hubei, Hunan, Fujian, Sichuan, Yunnan).
The wingspan is . Adults are similar to Macrothyatira stramineata, but considerably smaller and much duller, the hindwings suffused with dull brownish grey.