Adjustable fixing device for plant grafting

The invention discloses an adjustable fixing device for plant grafting, and relates to the technical field of plant grafting simulation. Comprising a branch base, a plurality of fixing holes with different diameters are formed in the branch base, a plurality of sets of self-adaptive limiting assemblies are arranged in the branch base, and a plurality of fixing bases are further arranged on one side of the branch base in a sliding mode; the self-adaptive limiting assembly comprises a plurality of fixing plates, and the fixing plates annularly surround the outer ring of the fixing hole. Branches are positioned through the fixing holes, during grafting simulation, the branches do not need to be held by hands, the grafting technique does not need to be corrected, due to the fact that the limiting blocks abut against the branches through the springs, slight shaking still occurs when the limiting blocks are locked and touch the branches, but due to the fact that the limiting blocks are matched with curves, bud head