The utility model relates to the technical field of guide devices, and discloses a channel steel guide device of a dynamic platform, which comprises a guide steel tank, a guide rail, a guide rail and a guide rail, and the guide mechanism is arranged in the guide steel tank. According to the channel steel guiding device of the dynamic platform, due to the design of the guiding plates, the good guiding effect on the rolling wheels can be achieved, due to the design of the balls, friction of the guiding plates to the rolling wheels can be reduced, then the rotating smoothness of the rolling wheels is guaranteed, and when the rolling wheels deviate, the outer surfaces of the rolling wheels extrude the whole guiding plates; the guide plates drive the short rods to move along the interiors of the long plates, at the moment, the first springs are compressed during movement of the guide plates, due to the elastic force effect of the first springs, the guide plates are reset and buffered, then the good deviation rectifying effect is achieved on the rolling wheels, and therefore the dynamic platform can be prevented from deviating during movement.