Agricultural production in Shandong Province exhibits an important status in China.However,the increasingly serious occurrence of agricultural pollution severely affects the advantage agricultural production and the environmental quality of its prominent origins.The main factors were analyzed in the 6 aspects of fertilizer,poultry and livestock manure,living sewage,straw,pesticide,and agricultural plastic film.Nitrogen and phosphorus loss from 2001 to 2006 was calculated.Results showed that the main causes for agricultural pollution in Shandong Province are the excessive input of agricultural chemicals and the excessive output of agricultural wastes,as well as their unreasonable utilization.Manure,fertilizer,and living sewage were the three main sources in terms of the contribution to nitrogen and phosphorus loss.In 2006,the three sources caused a total loss of 672 700 ton nitrogen and 135 000 ton phosphorus,among which,to Nitrogen loss load,manure,fertilizer,and living sewage accounted for 50.78%,41.99%,and 7.22% and to phosphorus loss load,80.30%,11.78%,and 7.93%,respectively.More attentions should be paid to the researches on high effective application techniques of agricultural chemicals and utilization techniques of agricultural wastes as to the prevention of agricultural pollution sources in Shandong Province.