The invention relates to a fur stretching device. The fur stretching device comprises a supporting table, a clamping assembly, nail plates and a positioning piece, the supporting table is placed on the ground, two sliding rails are arranged on the two sides of the upper surface of the supporting table, the clamping assembly is arranged on the supporting table and located between the two sliding rails, the clamping assembly comprises clamping blocks, the clamping blocks are in sliding connection with the sliding rails, the two nail plates are provided and are horizontally placed on the slidingrails, fur is fixed on the nail plates, the side surfaces of the sides, close to each other, of the nail plates are arranged as arc surfaces, the clamping blocks can push the two nail plates to move towards each other, so that the connecting portion of the nail plates is arched upwards to stretch the fur, the two nail plates form a V-shaped structure, an opening faces downwards, the positioning piece is arranged at the opening of the V-shaped structure formed by the two nail plates, and the positioning piece connects the lower ends of the two nail plates to define the positions of the two nailplates. According to the fur stretching device, the fur can be stretched, moreover, the fur can be kept in a stable tension state in a relatively long period of time, and the problem of looseness isnot prone to occurrence.