Reinforced　concrete　(RC)　deep　flexural　members　have　been　widely　used　in　the　field　of　concrete　structures.　Unlike　reinforced　concrete　slender　beams,　RC　deep　flexural　members　often　exhibit　strong　size　effect　characteristics　during　their　shear　failures,　interpreting　why　the　design　of　the　shear　capacity　of　RC　deep　flexural　members　shall　be　different　from　that　of　RC　slender　beams.　In　the　code　of　GB　50010—2010,　a　formula　for　the　shear　capacity　of　RC　deep　flexural　members　is　suggested,　but　it　does　not　account　for　the　size　effect　or　the　influence　of　longitudinal　reinforcement.　In　this　work,　a　total　of　1023　test　data　of　RC　deep　flexural　members　are　collected　by　reviewing　relevant　literature,　and　the　gray　correlation　method　is　employed　to　determinie　the　significance　of　various　factors　affecting　the　shear　capacity.　Subsequently,　based　on　the　regression　analysis,　the　correction　factors　for　size　effect　and　the　longitudinal　reinforcement　are　proposed,　and　revision　to　the　GB　50010—2010　is　recommended.　Finally,　the　rationality　and　accuracy　of　the　revised　calculation　formula　are　verified　through　the　collected　test　data.　The　study　shows　that　the　revised　formula　can　comprehensively　reflect　the　influence　of　important　factors　and　has　obvious　advantages　in　terms　of　mean　value,　coefficient　of　variation,　and　safety　factor.　©　2023　Editorial　Office　of　China　Civil　Engineering　Journal.　All　rights　reserved.