Fruit tree grafting method

The invention discloses a fruit tree grafting method. The method comprises the steps of scion collection, rootstock preparation, grafting cutting and management after grafting, and a grafting device is used for grafting cutting. Grafting cutting comprises the following steps that a first working arm of the grafting device is close to a rootstock, a notch at the front end of the first working arm stretches into a to-be-cut point of the rootstock, the first working arm and a second working arm which are hinged to each other are rotated, the second working arm drives an M-shaped grafting knife onthe first working arm to move forwards, the M-shaped grafting knife makes contact with a cushion table at the front end of the first working arm and is clamped, and therefore the rootstock is cut into an M-shaped knife edge; and a scion branch is cut into scion branch sections with inverted M-shaped knife edges by the same method. By means of the method, the thickness range of rootstock and scionselection can be effectiv