The color reaction conditions of vanadium with 1(2pyridylazo)2naphthol(PAN)were researched,and a new method was developed for the determination of vanadium in soil.It was based on the fact that vanadium forms a stable complex with PAN and hydrogen peroxide in an acidic medium of 1 mol ·L -1 HCl and in the presence of sodium dodecylbenzene sulfonate(SDBS)as sensitization agent.The maximum absorption of the complex was 575 nm with apparent molar absorptivity of 364×104 L·mol-1·cm-1.The linear range of the method was 02～12 μg·mL-1.Beer′s law was kept in the concentration range within 12 μg·mL-1 of vanadium.The proposed method was used for determination of vanadium in 4 samples of soil.The recoveris of vanadium in different levels were 1004%~1056%.With RSD of no more than 6%.