Numerical simulations of three dimensions two-phase flow field of tail-pipe SRM under spinning condition are carried out. The differences of the particle trace and particle concentration along the wall of tail-pipe nozzle between the different diameters 10 μm, 40 μm, 70 μm,100 μm and different spinning velocities 0, 100 r/min, 300 r/min, 500 r/min, 1 000 r/min are studied. The results show that:①In comparison with the particle movement trace and particle concentration distributing rule under the no-spinning condition, the particle movement path and time are increased and the change of particle movement rule is obvious under the spinning condition;②With the increase of the spinning velocity, the movement path and area of particles and residence time are increased;③With the increase of the particle diameter, the particle residence time is shortened because the particle inertia has more effects than the trend to revolving effect;④With the increase of the spinning velocity, the particle concentration in surface of conocyl grain is increased, and the particle congregation area is transferred from the fin top to the root of finocyl grain. The particle concentration is reduced in axis of flow path with the increase of spinning velocity.