Ternary　Tb-Fe-B　ribbons　were　prepared　via　melt-spun　technique　under　different　wheel　speeds　of　5-25　m/s.　Effect　of　wheel　speed　on　the　crystal　structure　and　microstructure　of　the　ribbons　was　investigated.　All　the　ribbons　quenched　under　different　wheel　speeds　crystallized　in　single　Tb2Fe14B　phase　with　tetragon　structure.　Different　crystallographic　alignment　evolutions　were　observed　in　the　free　side　surface　and　wheel　side　surface　of　the　ribbons.　On　the　free-side　surface,　an　in-plane　c-axis　crystal　texture　of　Tb2Fe14B　phase　was　found　in　the　ribbons　quenched　at　5　m/s.　However,　with　the　increase　in　the　wheel　speed,　the　direction　of　the　c-axis　texture　turns　to　perpendicular　to　the　ribbon　surface.　On　the　wheel-side　surface,　a　strong　c-axis　texture　perpendicular　to　the　ribbon　surface　was　observed　in　the　ribbons　quenched　at　5　m/s,　and　then　weakened　gradually　with　the　increase　in　the　wheel　speed.　Further　investigation　showed　that　the　competition　of　the　two　types　of　temperature　gradients　during　the　quench　process　was　responsible　for　the　crystallographic　alignment　evolution　in　the　ribbons.