30 published references were used to analyze the accumulation and correlation of heavy metal contents in pig manure and farmland soil. The study areas in the original papers included Shanghai, Zhejiang, Jiangsu, Fujian, Shandong, Henan, Shanxi, Shaanxi, Qinghai, Beijing, Jilin, Baoding, Dongguan, Urumqi, Shihezi, and downstream of the Xiang river, a total of 550 mean values of heavy metals were analyzed from 2 000 more samples of pig manures and 1 700 more farmland soil samples included in these references. It was founded that Cu has highest over standard rate in the pig manure, then followed by Zn; but Cu and Zn were accumulated little in the farmland soil although they mainly came from pig manure. Cd had the highest over standard rate in soil, then followed by Cr, but they did not mainly come from pig manure.