The invention provides a driving device of a winch belt shaft, belonging to the technical field of machinery. The driving device solves the technical problems that the driving device of the existing winch belt shaft has complex structure and poor use stability and the like. The driving device of the winch belt shaft in the invention is arranged at the extending end of the belt shaft of the lateralpart of the winch; the mechanism comprises a fixed base and a rotating body; the fixed base is connected with the extending end of the belt shaft by a connecting structure; the inner end of the rotating body is sleeved on the fixed base; the outer end of the rotating body is provided with plugging holes; a spring is arranged between the rotating body and the fixed base; under the elasticity of the spring, the inner end surface of the rotating body and the outer end surface of the fixed base are attached together mutually; a one-way clutch mechanism which is formed by meshing of one-way teethon the surface thereof is arranged between the inner end surface of the rotating body and the outer end surface of the fixed base; and by the one-way clutch mechanism, the rotating body can drive thefixed base to rotate together only by rotating along one direction therein. The driving device has the advantages of higher stability, more convenient installation and maintenance and the like.