Three new genera of spiders are described: Jishiyu Lin & Li, gen. nov., of Agelenidae C. L. Koch, 1837, with J. songjiang Lin & Li, sp. nov. (♂, China: Yunnan) as the type species, Marusik Lin & Li, gen. nov., of Gnaphosidae Banks, 1892, with M. yurii Lin & Li, sp. nov. (♂, Vietnam) as the type species and Xiaoliguang Lin & Li, gen. nov., of Phrurolithidae Banks, 1892, with X. huarong Lin & Li, sp. nov. (♂♀, Vietnam) as the type species. Thirty-five new species are described in 12 families: Corinnidae Karsch, 1880: Spinirta qishuoi Lin & Li, sp. nov. (♀, China: Guangxi); Hahniidae Bertkau, 1878: Cicurina miniae Lin & Li, sp. nov. (♀, Vietnam); Halonoproctidae Pocock, 1901: Latouchia wenruni Lin & Li, sp. nov. (♂♀, China: Hainan); Liocranidae Simon, 1897: Oedignatha wuyong Lin & Li, sp. nov. (♂♀, Vietnam) and Sphingius gongsunsheng Lin & Li, sp. nov. (♀, Vietnam); Nemesiidae Simon, 1889: Sinopesa guansheng Lin & Li, sp. nov. (♂, China: Yunnan); Phrurolithidae Banks, 1892: Edelithus huyanzhuo Lin & Li, sp. nov. (♂♀, Vietnam), E. linchong Lin & Li, sp. nov. (♂♀, Vietnam), E. qinming Lin & Li, sp. nov. (♂♀, Vietnam), Grandilithus linglingae Lin & Li, sp. nov. (♂♀, Vietnam), G. yangzhi Lin & Li, sp. nov. (♀, Vietnam), Lingulatus chaijin Lin & Li, sp. nov. (♀, Vietnam), L. dongping Lin & Li, sp. nov. (♂♀, Vietnam), L. liying Lin & Li, sp. nov. (♂♀, Vietnam), L. longfeiae Lin & Li, sp. nov. (♂♀, Vietnam), L. luzhishen Lin & Li, sp. nov. (♂♀, Vietnam), L. zhangqing Lin & Li, sp. nov. (♂♀, Vietnam), L. zhutong Lin & Li, sp. nov. (♂♀, Vietnam), Otacilia liuxinyei Lin & Li, sp. nov. (♂♀, Vietnam), O. wusong Lin & Li, sp. nov. (♂, Vietnam) and O. xuning Lin & Li, sp. nov. (♀, Vietnam); Pimoidae Wunderlich, 1986: Pimoa zeluni Lin & Li, sp. nov. (♂, China: Hebei); Salticidae Blackwall, 1841: Epeus covid Lin & Li, sp. nov. (♂♀, China: Yunnan); Theridiidae Sundevall, 1833: Phoroncidia minlangi Lin & Li, sp. nov. (♀, China: Fujian); Thomisidae Sundevall, 1833: Borboropactus nanda Lin & Li, sp. nov. (♂♀, China: Yunnan), Cozyptila haocongi Lin & Li, sp. nov. (♂♀, Vietnam), Lysiteles huyilinae Lin & Li, sp. nov. (♂♀, Vietnam), Massuria daizong Lin & Li, sp. nov. (♂♀, China: Yunnan) and Zametopina wanliae Lin & Li, sp. nov. (♂, Vietnam); Trachelidae Simon, 1897: Utivarachna yumaoi Lin & Li, sp. nov. (♂, Vietnam); Zodariidae Thorell, 1881: Asceua shuangreni Lin & Li, sp. nov. (♂♀, Vietnam), Cydrela likui Lin & Li, sp. nov. (♂♀, Vietnam), Mallinella lisongi Lin & Li, sp. nov. (♂♀, Vietnam), M. pingzhoui Lin & Li, sp. nov. (♂♀, Vietnam) and M. sena Lin & Li, sp. nov. (♂♀, Vietnam). One genus name and one species name are detected as homonyms and thereby replacement names for the preoccupied names are proposed, in accordance with Article 60 of the International Code of Zoological Nomenclature (ICZN, 1999), i.e., Xilithus Liu & Li, nom. nov., ex Acrolithus Liu & Li, 2022 (preoccupied nomen); Araneus xiang Mi & Li, nom. nov., ex Araneus arcuatus Mi & Li, 2022 (preoccupied nomen). Therefore, all 16 species of Acrolithus Liu & Li, 2022 are transferred to Xilithus Liu & Li, nom. nov.