Abstract: The paper studied that the weed controlling effect of penoxsulam ?cyhalofop-butyl and safety on rice and influence of the following crops in direct rice fields. The results indicated that the controlling effect of penoxsulam ?cyhalofop-butyl is high eficacy and long efective duration on some gramineaous, broadleaf and cyoeraceae weeds. Penoxsulam ?cyhalofop-butyl is safety to direct seeding rice and raise production of rice. Experiment of security evaluating show that penoxsulam ?cyhalofop-butyl is safety to mostly following crops(wheat, oilseed rape and radish) too. So penoxsulam ?cyhalofop-butyl should be extensively application in direct seeding rice area.