通过芳胺与芳醛的缩合反应，合成了１２个希夫碱系有机化合物，测试了它们的紫外－可见吸收曲线，结果表明：１２个希夫碱系有机化合物的最高吸收波长都在紫外区内．随着芳环（Ａ）取代基供电性的增加，芳环（Ｂ）取代基吸电性的增加，希夫碱系有机化合物的吸收波长红移，采用固体粉末方法测试了合成产品的ＳＨＧ效应，结果发现其中４个品种具有ＳＨＧ活性． Twelve Schiff base organic compounds were synthesized by the condensation reaction of aromatic amines and aromatic aldehydes. Their UV-Vis absorption curves were also measured. The results showed that all the twelve Schiff base organic compounds had the highest absorption wavelength in the ultraviolet region Inside. The SHG effect of the synthesized product was tested by the solid powder method with the increase of the chargeability of the aromatic ring (A) substituent, the increase of the electronegativity of the aromatic ring (B) substituent and the red shift of the absorption wavelength of the Schiff base organic compound As a result, four of the cultivars were found to have SHG activity.