Pot experiments were conducted to study the effects of them on the content and concentration factor of these pollutants in different vegetables through spreading photosynthetic bacteria in different soils contaminated by lead,cadmium and carbofuran.After photosynthetic bacteria were spread in contaminated soils,the results showed that the carbofuran in experimented vegetables and lead and cadmium in pumpkin,luffa and zuchicini were not measured.Times of exceed the standard of lead and cadmium in other vegetables was reduced by 10 times and 100 times,respectively.Moreover,the concentration factors of lead and cadmium was reduced by 10 times and 100 times,respectively.And carbofuran was not concentrated in the vegetables.The contents of lead and cadmium in these melon vegetables(pumpkin,luffa and zuchicini)reached the standards of GB 14935 94 and GB 15201 94,and the contents of carbofuran in experimented vegetables reached the standard GB 2763 2005.In the meantime,the results illustrate that photosynthetic bacteria can obviously decrease the absorption of lead,cadmium and carbofuran,and effectively ensuring the food safety of these melon vegetables.