This section analyses the results of the experiment. The separation performance of the cyclone treating the sand particle size less than 180µm is 0.74863, particle size between 180µm and 250µm is 0.96159, particle size between 250µm and 1000µm is 0.95446, particle size bigger than 1000µm is 1.22391.To see the particle at large is more performance than the particle at small, to see that size As a result as performance separation of fluid. If the new particle diameter is bigger than the old particle, the separation is better than then too. To see that the results are not in accordance with the theory of just the same, because of the operation actually have a sampling error can happen.