Abstract: Using the equipment of scattering measuration,the scattering effects of the extracts distilled from the leaves and young fruits of Ailanthus altissima were measured in different doses.The result showed that the scattering effects of the extracts were obvious compared with CK,the scattering effects of extracts distilled from the leaves were better than that distilled from the young fruits,and it was related to the doses of the extracts.There was a logartithm curve relation between the dose and scattering ratio,and the best scattering dose was 1.00 mL.