The invention relates to the technical field of fluid mechanics power machinery, in particular to a fluid kinetic energy synergistic device. The fluid kinetic energy synergistic device comprises a center wheel, multiple steering blades and multiple reversing blades. The multiple steering blades are mounted on the center wheel in a divergent manner, the reversing blades and the steering blades aremovable hinged, and the reversing blades are arranged on the sides, facing the fluid direction, of the steering blades. According to the fluid kinetic energy synergistic device, the reversing blades and the steering blades are not easily affected by the wind direction change, incoming wind from all directions can be used as power of the reversing blades and the steering blades to be effectively utilized, the force bearing effect of the whole device and the working efficiency of a wind driven generator are improved, and a rudder is not needed. When wind power positively affects the regions of the reversing blades, the front faces of the reversing blades bear force, and the force bearing area is increased. At the negative effect initial stage, the reversing blades are driven by fluid, the reversing blades carry out reversing to be automatically unfolded, the reversing blades are controlled by a buffer mechanism when unfolded, and the opening angles of the reversing blades are larger than90 degrees and smaller than 160 degrees.