Different methods, including bait treatment, powder treatment and drench treatment were used to control Solenopsis invicta and their impacts on native ants in greenbelt were evaluated. These are what the results showed: Based on the index of the reducing rate of both active mound and workers, the effect of powder treatment to RIFA was rapid and stable, and it could be popularized to use widely; Compared with powder treatment，the effect of bait treatment was slower with its best control effect appearing 35 days later after treatment; The drench treatment could efficiently reduce the mound number in a short time, but it had little control effect on workers, and had the poorest control effect among the three treatments; Moreover, bait treatment and powder treatment could reduce the species and numbers of native ants remarkably in greenbelt; Drench treatment had the smallest impact on native ants. Through the analyses of the diversity index about every district，evenness index and predominance index of ant community before and after pesticides were used, it was found that all of indices were declining. The results showed that chemical control could control the red imported fire ant effectively; meanwhile the species of native ants were reduced.