Abstract: In order to research the possibility of repairation of groundwater polluted by landfill leachate by PRB, the author researched on treatment on groundwater polluted by landfill leachate using zero-valent iron, bentonite, zeolite, activated carbon and slag. The results showed that: treatment to COD with activated carbon was the best, which the removal rate reached to 76.0%. Treatment to COD with zeolite was the worst, which the removal rate was only 45.0% . However, treatment to NH ₃ with zeolite was the best, which the removal rate reached to 70.8% . Treatment to NH ₃ with zero- valent iron was the worst, which the removal rate was only 42.3%. Experiment continued with zero valent iron, activated carbon and zeolite in different proportioning. It concluded that treatment to COD with zero valent iron, activated carbon and zeolite in 2:2:1 was the best, and then was 1:2:2 and 2:1:2. Treatment to NH ₃ with zero valent iron, activated carbon and zeolite in 1:2:1 was the best, and then was 2:1:2 and 2:2:1.