The camera was used to study the trajectories of particle in the rotational flow field to obtain the motion parameters. The variation law of velocity and acceleration of particles with different experimental section speeds and particle diameters was analyzed. The results showed that the motion of particle in the rotational flow field can be divided into the development stage and the steady stage. The movement trajectory was similar to a ellipse, when the particle circularly moved in the steady stage. With the increase of the rotational speed, the particle velocity and acceleration increased and showed a cyclic variation, and the periodic amplitude of the particle velocity and acceleration is gradually increased. With the increase of particle diameter, the particle velocity and acceleration reduced, and the particle tended to be stationary when the particle was near the wall.