Abstract: The experiments on application effect and action mechanism of ABT on cucumber were carried out and three trials(seed germination trial，seedling trial and field tria1)were conducted．The results indicated that ABT6 has positive effect on the content of internal hormone in stem apex and root of Chinese cabbage．The rate and potential of seed germination，the peroxdase content in seedling stem apex，the dehydrogeniase content in seedling root and the yield of Chinese cabbage treated with ABT6^#，increased by 6.34％ ，17.04％ ，16.84％ ，62.16％ ，and 10.58％ ，respectively as compared with contro1．