CFD模拟。Considering the structural intricacy of the drip irrigation emitter with labyrinth channel, this paper utilized the numerical simulation method by CFD and observation method by PIV to simulate and observe the movement regulation of the solid particles in labyrinth channel, and analyzed the results of the two methods. The results show that the movement trajectories of the solid particles with different diameter and density calculated by CFD software accord with the actual movement trajectories observed by PIV machine well. When the diameter is 65μm or the density is 1740kg/m3, the difference of the path length between the numerical simulation by CFD and observation by PIV is very little, but it is big when the diameter or density is big as the actual movement of solid particles are more closing to the mainstream. It is feasible to simulate the velocity of solid particles by CFD software, but the time of the high speed of particles can keep longer than the simulation one.