This application discloses a tensioning device for flexible scenery, comprising: a movable base; a mounting mechanism disposed on the movable base for mounting the main
rattan of a
rattan bridge; and a telescopic mechanism having a telescopic rod connected to the movable base for moving the movable base to tension the main
rattan. When the tensioning device is in operation, the telescopic rod first controls the movable base to move closer to the rattan bridge. Then, the operator mounts the main rattan onto the mounting mechanism. Because the rattan bridge is not tensioned at this time, i.e., the main rattan is not tensioned, it is relatively easy to
mount it onto the mounting mechanism. Then, the telescopic rod operates, causing the movable base to move away from the rattan bridge, at which point the main rattan can be quickly and reliably tensioned.