Concrete　materials　are　applied　extensively　in　cryogenic　temperature　environment.　However,the　investigation　on　the　mechanical　property　of　concrete　at　cryogenic　temperature　is　not　enough.　To　investigate　the　tensile　properties　and　their　size　effect　law　of　concrete　materials　at　cryogenic　temperature,cube　concrete　specimens　with　side　lengths　of　100　mm,150　mm　and　300　mm　were　designed　and　the　splitting-tensile　tests　were　carried　out　at　four　temperature　levels(T=20　℃,-30　℃,-60　℃　and　-90　℃).　The　corresponding　failure　patterns,load-deformation　curves　and　splitting-tensile　strength　were　obtained.　The　test　results　show　that　coarse　aggregate　particles　within　concrete　specimens　subjected　to　splitting-tensile　loading　at　cryogenic　temperature　fail　more　severely　than　the　counterparts　at　room　temperature.　With　the　decrease　in　temperature,the　splitting-tensile　strength　of　concrete　is　significantly　higher　than　that　at　room　temperature.　The　splitting-tensile　strength　of　concrete　at　cryogenic　temperature　has　obvious　size　effect.　The　size　effect　behavior　is　more　significant　with　the　decrease　of　temperature.　The　classical　Type-2　size　effect　law　can　well　describe　the　size　effect　of　splitting-tensile　strength　of　concrete　at　cryogenic　temperature.　©　2023　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.