Abstract: Sunflower Bloomrape （Orobanche cumana Wallr） is a kind of obligate parasitic weed which only parasite on sunflower, tobacco and tomato. In recent years, the occurrence area of sunflower bloomrape was expanded enormously in Inner Mongolia due to the large quantities of sunflower introduction from domestic and foreign markets under poor management and the cultivation of sunflower varieties highly susceptible to sunflower bloom rapes, especially in the region of Bayannur, it has causing enormous economic losses. In this paper described the detailed information of the sunflower bloomrape and some other species in the genus Orobanche including their synonyms, distribution, life history,occurrence regularity and control techniques which can provide assistance to the control of Orobanche weeds on sunflower.