Orobanche is a kind of parasitic weeds, seriously endangering the development of sunflower industry. In order to effectively identify the resistance of registered sunflower varieties to Orobanche cumana and speed up the popularization and application of excellent varieties, 36 domestic representative registered varieties of edible sunflower were selected, and identified the resistance to O. cumana in luguanhao village of wulateqianqi and gaoyoufang village of Siziwangqi in the main sunflower producing areas of Inner Mongolia. 2020, we have selected Bayannur City (40°87′10″N, 108°53′92″S) and Wulanchabu City (41°51′10″N, 111°66′59″S) field trials should be conducted on the plots with serious occurrence of sunflowers. We randomly arrange the plots, each plot covers an area of 30 square meters, and the experiment is set for 3 repetitions. With the ‘SH363’ identified in the field as the control variety for the susceptibility. Investigate the parasitic rate and degree of parasitism in the sunflower blooming period. The results showed that race F was the dominant race in luguanhao village of wulatqianqi. Among them, 20 varieties such as ‘Tongxin 2’ and ‘Chengpai C93’ showed immune level; 11 varieties such as ‘SanRui 3’ and ‘Tiankui 16’ showed high resistance level; the other 5 varieties showed susceptibility or high sensitivity level in the field. The dominant race in gaoyoufang village of Siziwangqi was race G, of which 14 varieties such as ‘Tongxin 2’ and ‘Shengdi 1’ were immune; 16 varieties such as ‘Chengpai C93’ and ‘SanRui 3’ were highly resistant; ‘Longshikui 5’ was moderately resistant; the other 5 varieties were susceptible or highly susceptible. Among them, 11 varieties showed immunity in both regions, including ‘Tongxin 2’, ‘Shengdi 1’, ‘Longkui 27’, ‘Shengdi 777’, ‘Qiyuan 6’, ‘JR5511’, ‘Yimin 931’, ‘Yimin 303’, ‘Yimin 966’, ‘Yimin 969’, ‘Jingukui 33’, ‘S2009’ and ‘Xinnong 101’; 9 varieties showed high resistance to Orobanche cumana, including ‘SanRui 3’, ‘Tiankui 16’, ‘Zhengbodingsheng’, ‘Shuangxing 6’, ‘Zhongshikui 90’ , ‘Yimin 968’, ‘Chengpai K7’, ‘Chengpai K9’ and ‘Sanrui 11’. These varieties have good resistance and have good market prospects in the main sunflower producing areas in China.