Abstract：In this paper, the herbicidal activities of a type of new compounds have been investigated using the methods of biological test . The following results are obtained: All compounds studied here reveal higher selective,their herbicidal activities are very good to dicotyledon, but poor to monocotyledon. Most compounds can inhibit rooting, and help to produce callus tissues.There are a lot of difference among the compounds in biological activity. In addition, the structure activity relationships have also been discussed in this paper.
