The invention relates to a stirring device capable of retarding the settlement of solid particles, and aims to provide a stirrer with the characteristics of high axial flow performance, weak shearing action, high cycling rate, good upward and downward overturning effects and low energy consumption. According to the technical scheme, the stirring device capable of retarding the settlement of the solid particles comprises a stirred vessel and a stirrer arranged in an inner cavity of the stirred vessel, wherein the stirrer comprises a stirring shaft vertically positioned in the center of the stirred vessel and driven by a power device and stirrer blades uniformly arranged around the stirring shaft. The stirring device is characterized in that the stirrer blades comprise three blades symmetrically distributed on the axial line of the stirring shaft and are formed by bending flat plates, wherein points on the surfaces of the blades are distributed according to an equation shown in the description, and in the formula, axis z is overlapped with the axial line of the stirring shaft, an endpoint at the roots of the blades is positioned in a plane formed by axis x and axis y, r is the distance between any point on the blades and the coordinate origin, and x, y and z are coordinates of any point on the blades.