Abstract: The experiment was conducted in China Agricultural University from 1994 to 1998 to investigate the movement of Redroot amaranth,Common crabgrass,Barnyardgrass under wind force.The results show that almost all seeds of one plant for the three kinds of weed were moved to 50cm away under winds force not less than 4 grade.Soil,treated under 120℃ for 24 hours and then put in a 50cm wide,50cm long,5cm high box placed 10m far from these three kinds of living weed outside,got new seedling and extra seeds of these three kinds of weed seed three years later.Capturing-test in field showed that wind was one of driving forces for the movement of the seeds of Redroot Amaranth,Common Crabgrass,Barnyardgrss.