Asymmetrical　V-shaped　tunnels　often　appear　in　tunnels　crossing　the　river　or　urban　underground　road　tunnels.　The　smoke　flow　inside　is　affected　by　a　lot　of　factors.　A　full　understanding　of　the　smoke　flow　in　this　kind　of　tunnel　is　the　basis　of　the　smoke　control.　In　this　study,　the　effects　of　slope　composition　and　fire　heat　release　rate　(HRR)　on　the　longitudinal　induced　airflow　velocity,　the　smoke　back-layering　length　at　the　small　slope　side,　and　the　maximum　ceiling　temperature　were　studied　by　the　numerical　method.　The　results　show　that　when　the　fire　occurs　at　the　slope　change　point　of　the　V-shaped　tunnel,　the　maximum　ceiling　temperature　decreases　with　the　increase　in　the　slope　of　the　large-slope　side　tunnel.　The　longitudinally　induced　velocity　is　primarily　related　to　the　slope　of　the　large-slope　side　tunnel　and　the　fire　HRR.　When　the　slope　difference　between　the　side　tunnels　or　the　slope　of　the　large-slope　side　tunnel　is　large,　the　smoke　in　the　small-slope　side　tunnel　flows　back　toward　the　fire　source　after　reaching　its　maximum　dispersion　distance　and　then　reaches　a　quasi-steady　state.　The　smoke　back-layering　length　is　mainly　affected　by　the　slope　and　length　of　the　large-slope　side　tunnel.　When　the　slope　of　the　large-slope　side　tunnel　is　9%,　the　induced　airflow　velocity　from　the　small-slope　side　can　prevent　the　spread　of　smoke.　The　empirical　models　of　the　smoke　back-layering　length　and　the　longitudinal　induced　airflow　velocity　in　the　small-slope　side　tunnel　are　drawn,　respectively,　by　the　theoretical　analysis　and　the　numerical　results.　This　study　can　provide　technical　support　for　the　design　and　operation　of　smoke　control　systems　in　V-shaped　tunnels.