A new compound with biological activity had been synthesized by the reaction between 5-(p-chlorophenyl)-2-amino-1,3,4-thiodiazol and aroyl isocyanates.The structure of the target compound was confirmed by IR,UV,1HNMR spectrum and elemental analysis.The biological activity tests showed that the target compound had an activity as plant growth regulator,the auxin activity was 26.1% and the cytokinin activity was 41.1%.