Abstract: Through the methods of adding the heavy metal Pb into unpolluted Granitic latosol in Hainan, after 2 fortnight’s equilibrium, adding lime, calcium magnesium phosphate, cow dung, calcium magnesium phosphate and the cow dung mixture match executes, taking Brassica chinensis as instruction crops, according to its different quality of physics and chemistry such as growth dynamic change and the biomass of the harvest, the absorbing capacity of the heavy metal, the soil pH, the content of heavy metal in the soil, we had appraised the improvement effects of each kind of modifiers to the Pb polluted in Granitic latosol. Then we could provide the reference for improving the Pb polluted in Hainan Granitic latosol. The results indicated that the Pb pollution soil could be remedied by each modifier and the poison symptom of Brassica chinensis could be reduced. The best treatment was Calcium magnesium phosphate and the cow dung mixture, the Brassica chinensis had higher biomass and lower Pb content next treatment was calcium magnesium phosphate processing.