The shortcomings of existing derusting methods were analyzed,a new method of small-steel-ball impact derusting was put forward and relevant device was designed.The small-steel-ball impact derusting method and the structural characteristics and action principle of the device were introduced in detail.The interaction between small steel balls and between small steel balls and corroded surface in derusting process were studied,and the feasibility of the derusting method was analyzed.The multi-body dynamics software ADAMS was used to simulate the process of small steel ball impact derusting,to verify the rationality of theoretical analysis and the feasibility of the derusting method and device.The influence of different working parameters on the interaction between small steel balls and corroded surface was analyzed.Theoretical analysis and simulation show that the small ball impact rust removal method and device are feasible,and the indirect contact force between the small ball and the rusted surface can be changed by controlling the rotating speed and pressing force of the rotating disc,so that the rusted surface can meet the requirements of different cleanliness and roughness.