The invention discloses a kW-grade supercritical carbon dioxide radial flow type turbine structure with the flow dividing blades. A volute, fixed blade grids, movable blade grids and the flow dividingblades are included, wherein the fixed blade grids, the movable blade grids and the flow dividing blades are arranged in the volute; each flow dividing blade is arranged between every two adjacent movable blade grids; each fixed blade grid flow channel is formed between every two adjacent fixed blade grids, and movable blade grid flow channels are formed between the movable blade grids and the flow dividing blades; in work, supercritical carbon dioxide work media enter the structure from the volute, the gas is uniformly allocated into the fixed blade grid flow channels by the volute, the pressure of the work media in the fixed blade grid flow channels is gradually lowered, and the flow speed is gradually increased; and then the supercritical carbon dioxide work media enter the movable blade grid flow channels, in the movable blade grid flow channels, the supercritical carbon dioxide work media push an impeller to rotate and output work, and finally discharging in the axial direction is achieved. In the kW-grade supercritical carbon dioxide radial flow type turbine structure with the flow dividing blades, due to the scheme of adding of the flow dividing blades and improvement of ageometrical angle of an impeller inlet, the pneumatic efficiency of the radial flow type turbine structure is substantially improved while the running safety is guaranteed, and important engineering significance and broad application prospects are achieved.