The invention discloses a radial device of a plate-spring-type bogie. The radial device of the plate-spring-type bogie comprises carrying-saddles; the carrying-saddles are installed on axles at the left and right sides of the front and rear wheel pairs; an arch plate spring is suspended between two carrying-saddles at the same side of the front and rear wheel pairs; the middle part of the arch plate spring is upwards protruded, and a swing bolster is installed below the center of the arch plate spring. The radial device of the plate-spring-type bogie is capable of effectively solving the conflict between the curve passing performance and lateral stability of the bogie, combining the function of an elastic side bearing, greatly simplifying the structure of the radial device, and saving the distribution space for other devices of the bogie; and greatly reducing the dead-weight of the bogie, improving the carrying capacity in the same condition, and reducing the production cost.