O-belt tensioning tool

The utility model discloses an O-belt tensioning tool, and belongs to the technical field of O-belt installation. The tool comprises two force application pieces, the two force application pieces are rotationally connected with each other, and one end of each force application piece is provided with a fixing mechanism used for pressing the two ends of the O-shaped belt. When the O-shaped belt is installed, the O-shaped belt can be wound on two rollers firstly, then the two ends of the O-shaped belt are fixed to the two force application pieces through the fixing mechanisms respectively, and therefore the O-shaped belt is installed. At the moment, the two force application pieces are held tightly by a single hand at the same time, the force application pieces can be driven to rotate so that the two ends of the O-shaped belt can be close to each other to be spliced, then the other hand is used for connecting the two ends of the O-shaped belt, in this way, the two ends of the O-shaped belt can be pulled by the s