Abstract: 【Objective】In order to screen and recommend the herbicides to control weeds in rapeseed fields in no-till mountain areas, 【Method】the weed control efficacy of nine herbicides, high and stable yields, and economic characteristics of rapeseed fields grown in 4 different altitude no-till mountain areas were compared, by using grey relation analysis and fuzzy clustering methods, during the year of 2013 and the year of 2015 in Yuxi city. 【Results】The results have illustrated that: (1) Weeds belonging 3 classes, 12 orders, 11 families, 25 genus and 26 species were found in the no-till rapeseed field. Ageratum conyzoides L., Galinsoga parviflora, Polygonum nepalense Meisn, and Digitaria sanguinalis (L. ) Scop. were main weeds, accounting for 43.80%, 34.0%, 10.40% and 4.4% of total weeds number, respectively; (2) there was varied association between main agronomic characteristics and different treatments of herbicides, number of effective silique per plant was the most association; (3) there were significant difference among the different weed control efficacy of herbicides. There were 3 treatments reaching 80% control efficacy after 30 day application, and their control efficacy were 89.8%, 89.6% and 85.6%, respectively. (4) The rapeseed yield treated with different herbicides varied at different degree. Compared to control, the rapeseed fields treated with Pyribambenz-propyl, Quizalofop-P, Acetochlor had higher yield. The first two herbicides increased yield by 52.25% and 50.04%, respectively. (5) Two treatments of Glyphosate+Acetochlor, and Glyphosate + Acetochlor+ Pyribambenz-propyl + Quizalofop-P showed the good comprehensive evaluation regarding to the index of high and stable yield in 4 different trials. Furthermore, the first treatment could save cost by 1065.0 yuan/hm², compared to the latter. 【Conclusion】Therefore, in the no-till rapeseed fields in low latitude mountain areas, we recommended to use the herbicides according to phase of rapeseed growing. 10-15 day before seeding, 41% Glyphosate-isopropylammonium was sprayed according to the concentration of 4.5kg/hm², and 90% Acetochlor 600ml/hm² mixed with 600kg water could spray evenly in the field before rapeseed germinate.