Tensioning device

The invention discloses a tensioning device. The tensioning device comprises a tensioner, a lifting hook, a luggage rope and a pull rope; the tensioner comprises a box body; an opening I is formed inthe box body; a ratchet wheel, a gear I, a gear II and a gear III are arranged on one side panel of the box body; a barrier strip is fixed on the gear I; the gear II is respectively meshed with the gear I and the gear III; a winder and a rotating shaft are arranged in the box body; one end of the winder penetrates through one side panel of the box body and is connected with the ratchet wheel; theother end of the winder is rotationally connected with the other side panel of the box body; one end of the rotating shaft penetrates through one side panel of the box body to be connected with the gear III, the other end of the rotating shaft is rotationally connected with the other side panel of the box body, a limiting structure and a reset structure are arranged on the rotating shaft, one endof the luggage rope is woun