Abstract: The occurrence, characteristics, negative impacts and main control measures of Cenchrus pauciflors Bentham in Tongliao were investigated since 2008, and the long-term positioning monitoring was set up from 2015 to 2017. The average coverage of Cenchrus pauciflors Benthanl was 19.7%, 21.0% and 24.7%, attd the seed bank was 199,210,and 231 seeds/m^2 in these 3 years. In 2016, the area of Cenchruspauciflors Bentham occurring in Tongliao region accounted for 79.8% of the country. According to hazard grade, in Tongliao it was classified as a level 3 severe occurrence. It will seriously endanger the development of local agrieuhure and animal husbandry, cause irreparable economic losses and threaten the safety of the ecosystem if effective prevention and control measures are not taken in time.

Key words: Alien invasive species;Cenchrus pauciflorus Bentham;Harmfulness;Control measures