Abstract: Experimental results show that the controlling effect of clomazone(36CS) is obvious on gramineaous weeds,but ineffective on some latifoliate weeds in soybean field.The mixture of clomazone and chlorimuron-ethyl is effective in controlling both gramineaous and latifoliate weeds,however,the mixture impacts the plant height,height of ear setting,length of ear without grains of maize.Clomazone and its mixture can cause albinism at seedling stage of maize,but are safety to the following wheat.