Soil samples were digested by alkali melting method. The contents of total phosphorus in soil determined by contin-uous flow analyzer and antimony colorimetric methods were compared and analyzed. The feasibility of determining total phos-phorus content in soil by continuous flow analyzer was discussed. The results showed that there was no significant difference and there was a good correlation between the two methods. The regression linear equation was y(flow analyzer -P)= 1.060 6 x(molybdenum-antimony anti-colorimetric method-P)-0.0191， R = 0.990 0. The recovery of total phosphorus in alkali-fused soils was 98.09%～102.89% by flow analyzer，and the relative standard deviation was 1.20%～ 2.07% after repeateddetermination of three samples for five times. Flow analyzer had high precision andaccuracy，less reagent consumption and high detection efficiency. It was suitable for the detection and analysis of total phosphorus for massive soil samples.