FIELD : machine building.SUBSTANCE : invention relates to mixing devices used in food, medical, chemical and construction industries, as well as in agriculture for mixing different materials, preparing homogeneous media and leveling the concentration of mixed substances throughout the volume. Winch harvesting mixing mechanism includes a post, a crank and a connecting rod, interconnected by rotary kinematic pairs, screw with blades rigidly installed on it and nut, which enter each other into a screw kinematic pair, nut forms a rotary kinematic pair with the post, and the connecting rod enters with the screw into the rotary kinematic pair, wherein axes of rotor pairs of nut-strut and con-rod-screw links are perpendicular, while axes of rotational pairs of crank-con-rod and screw-con-rod are crossed. Mechanism has a minimum number of links and a single drive, wherein it realizes complex spatial motion of the output link.EFFECT : invention provides a mixing mechanism, in which complex movement of the output link is realized without installation of additional links in form of a link and a stone, as well as there are no progressive kinematic pairs.1 cl, 2 dwg