According to the non-point source pollution characteristics of sediment-laden river,combining with the pollutant content relation between the river bed sediment and inner drainage area surface soil,advising the non-point source pollution loads estimation method of soil and water loss region in limited data direction and applying the method in Huaxian section of the Weihe River Basin.This method is simple and practicable,the requirement of data is less so the method can be applied for elementary estimation in soil and water loss region.The research shows: The correlation degree between total phosphorus load of non-point source pollution and flood season sediment discharge is highest and is 0.91 in Huaxian section of the Weihe River Basin,the correlation degree between ammonia nitrogen and flood season sediment discharge is 0.78 and the correlation degree between nitrate nitrogen and flood season sediment discharge is 0.77.In high sediment concentration year,the ammonia nitrogen output is 53 304 t,the nitrate nitrogen output is 18 878 t and total phosphorus output is 237 387 t;in natural and low sediment concentration year,the ammonia nitrogen output are respective 26 796 t and 9 204 t,the nitrate nitrogen output are respective 10 444 t and 4 847 t,the total phosphorus output are respective 144 431 t and 82 740 t.