In the revision of the genus Stenoloba Staudinger, 1892, which distributed mostly in the Oriental region(South-East Asia) and partially in Manchurian subregion of the Palaearctic region, 47 species including 25 new species and three new subspecies are recognized. In the first pat of this revision, 21 species with descriptions of 10 new species and two new subspecies are reviewed, with illustrations of 42 genitalia and 29 colour photos of adults. One species, Stenoloba albiangulata (Mell, 1943), comb. nov. is newly combined and transferred to this genus. The 2nd part will include 26 species, with descriptions of 15 new species.