1.Rationale for research: there is a lack of information about the occurrence of alien invasive weed species in Hubei Province, China.2.Objectives: to clarify the alien invasive weed species, its occurrence frequency and harm to crops in farmlands and to provide basic data for future survey.3.A brief description of methods and materials used: alien invasive weeds in 1010 fields whose area was more than 1000 m2 were surveyed with seven scales by visualization of weed dominance to crop in 2007.4.