Abstract: [Objective] To understand the effect of pendimethalin,prometryn and two kinds of medicament mixture to processing tomatoes and broomrape seed germination,processing tomato growth.[Method]The seed treatment and pot experiment were used in the study.[Result]Seed treatment test results showed that germination inhibition rate of 33;pendimethalin oil 7 μg/mL,50;prometryn wettable powder 7 μg/mL and two kinds of medicament mixture 1 μg/mL to broomrape seed were high and the tomato seed germination inhibition rate was low;Pot experiment results showed that inhibition effect of 33;pendimethalin oil 10 μg/mL,50;prometryn wettable powder 7 μg/mL and two kinds of medicament mixture 7 μg/mL to broomrape unearthed and growth was remarkable,and there was small or no inhibition to tomato plants growth.[Conclusion]33;pendimethalin oil,50;prometryn wettable powder and two kinds of medicament mixture had the potential to control broomrape in processing tomato field.