Abstract: 【Objective】 In order to explore the control effect and safety of herbicide adding synergist on broadleaf weeds in walnut-wheat intercropping field, this paper aims to perform related experiments to provide scientific basis for herbicide reducing application in wheat field. 【Method】 Randomized block design was used to research the number and the fresh weight of weeds at fixed spots, and the effect of herbicide reduced application on weeds and safety to winter wheat was evaluated. 【Result】 After forty-five days, under the condition of the dosage of 30.00% reduced, the control effect of 2% florasulam + 4% carfentrazone-ethyl OD, 10% halauxifen - methyl + 10% florasulam WG and 10% tribenuron - methyl WP added synergist 'Jijian' on broadleaf weeds were 92.33% - 97.97% and 98.78% - 99.57%, respectively. All the treatments did not negatively influence on the growth and development of the winter wheat. 【Conclusion】 6% difluorocarbon OD, 20% difluorocarbon WG and 10% tribenuron methyl WP can effectively control broadleaf weeds such as Descuminia sophia and Chenopodium glaucum in walnut wheat intercropping field. They are safe for the growth of winter wheat and can be used in field alternation reasonably.