Abstract: Three effective prescriptions have been selected after ten herbicides prescriptions were used in nursery of Chinese box ( Buxus sinica ),the effects of prescriptions of B、BD、BH are 93.2%、97.5% and 97.6%. Experiments of weed elimination have been done with different dosages of these prescriptions in the first ten day of March、 the last ten day of March and the middle ten day of April. The results showed that: the good effect had been made with low dosage of herbicides in the last ten day of March, And the effective controlling period is long; 0.3?mL/m 2 of BD is the best prescription in the last ten day of March, The weeding efficiency is 99.5% in the last ten day of March. Compared with manual work, the expense of weed elimination by chemical herbcides reduced 63.56%～72.67%.