Provided are a compounded weeding composition containing dicarfentrazone-ethyl, and a using method therefor. The compounded weeding composition comprises an active component A and an active component B, the active component A is dicarfentrazone-ethyl and the active component B is glyphosate or glufosinate, the weight proportion between the active component A and the active component B is 1:100-1 and preferentially 1:60-1. The compounded weeding composition has synergistic effects, and has very good activity on preventing resistance weeds.
