Mesoraphidiidae is one of the major groups among the Mesozoic Raphidioptera, with 70 described species in 30 genera. However, many mesoraphidiid taxa need to be revised and the monophyly of this family is still questionable, lacking conclusive support from convincing autapomorphies. Here, we present a systematic revision of Mesoraphidiidae from the Lower Cretaceous Yixian Formation of north-eastern China. Nine genera and 12 species are described or re-described based on 27 fossil specimens, including four new genera and five new species, namely Allocotoraphidia gen. nov., Yixianoraphidia gen. nov., Beipiaoraphidia martynovi gen. et sp. nov., Grammoraphidia ponomarenkoi gen. et sp. nov., Proraphidia jepsoni sp. nov., Proraphidia yixianensis sp. nov. and Styporaphidia willmanni sp. nov. Two new combinations are proposed, Yixianoraphidia anomala (Ren, 1997 Ren, D. 1997. Studies on the late Mesozoic snakeflies of China (Raphidioptera: Baissopteridae, Mesoraphidiidae, Alloraphidiidae). Acta Zootaxonomica Sinica , 22 , 172–188. [In Chinese, with English summary] [Google Scholar]) comb. nov. and Allocotoraphidia myrioneura (Ren, 1997 Ren, D. 1997. Studies on the late Mesozoic snakeflies of China (Raphidioptera: Baissopteridae, Mesoraphidiidae, Alloraphidiidae). Acta Zootaxonomica Sinica , 22 , 172–188. [In Chinese, with English summary] [Google Scholar]) comb. nov. Proraphidia Martynova, 1947 Martynova, O. M. 1947. Two new snakeflies from the Jurassic shales of Karatau. Doklady Akademii Nauk SSSR. Reports of the Academy of Sciences, USSR , 56 , 635–637. [In Russian] [Google Scholar] and Styporaphidia Engel & Ren, 2008 Engel, M. S. & Ren, D. 2008. New snakeflies from the Jiulongshan Formation of Inner Mongolia, China (Raphidioptera). Journal of the Kansas Entomological Society , 81 , 188–193. doi:10.2317/JKES-802.19.1 [Crossref], [Web of Science ®] , [Google Scholar] are first recorded from the Lower Cretaceous of China. Phiradia Willmann, 1994 Willmann, R. 1994. Raphidiodea aus dem Lias und die Phylogenie der Kamelhalsfliegen (Insecta: Holometabola). Paläontologische Zeitschrift , 68 , 167–197. doi:10.1007/BF02989439 [Crossref] , [Google Scholar] stat. rest. is restored as a valid genus. A preliminary phylogenetic analysis is performed to investigate the relationships among the genera of Mesoraphidiidae based on morphological data. The monophyly of the subfamily Alloraphidiinae and the tribe Nanoraphidiini, respectively, were supported in the present analysis; several genera with three forewing radial crossveins or with subradial crossveins (i.e. Cretinocellia Ponomarenko, 1988 Ponomarenko, A. G. 1988. New Mesozoic insects. Transactions of the Joint Soviet-Mongolian Paleontological Expedition , 33 , 73–80. [In Russian] [Google Scholar], Allocotoraphidia gen. nov., Kezuoraphidia Willmann, 1994 Willmann, R. 1994. Raphidiodea aus dem Lias und die Phylogenie der Kamelhalsfliegen (Insecta: Holometabola). Paläontologische Zeitschrift , 68 , 167–197. doi:10.1007/BF02989439 [Crossref] , [Google Scholar] and Xuraphidia Hong, 1992) were assigned to earlier diverging groups in Mesoraphidiidae; however, the monophyly of Mesoraphidiinae was not recovered. The present study sheds light on the evolutionary history of Raphidioptera. http://zoobank.org:pub:610CD366-6328-4F5D-9AD0-71A69866C18B