Belongs to sulfonylurea herbicide Trifloxysulfuron, after applying pesticide can be absorbed by the root, stem and leaf of weed, can be in plant body upward and downward transmission, by inhibiting the acetyl lactic acid synthase activity (ALS), and the branched chain amino acids (such as leucine, isoleucine, valine, etc.) biosynthesis. Plants suffer after the show is growing point necrosis, veins green, severely inhibit plant growth, dwarf, plants die in the end. Trifloxysulfuron of weeds and crop selectivity is mainly due to differences in metabolic degradation. In the cotton and sugar cane can be rapidly in vivo metabolism to active substances, so that crop plants from harm. Endives (bitter radicchio dishes) and quinoa (ash), quinoa, gray green quinoa, purslane, amaranthus retroflexus, socket head of amaranth, green grain amaranth, stab cephalanoplos, bract fruit, ragweed, ghost needle grass, African, alternanthera philoxeroides, wild rapeseed, Tian Xuan flowers, xanthium sibiricum, feels ashamed and a bowl of intestinal lotus grass (drought), sesbania, wins red thistle, feather mans chrysanthemum, arm grass pulp, spurge, from the wine grass (Mimi acid), and other broad-leaved weeds have very good control effect; Have the special effect of cyperus rotundus (triangular grass); Of barnyard grass, eleusine indica, digitaria, drought green bristlegrass, sorghum and so on gramineous weed control effect is poorer.