Abstract: The Two-component model assumes that UV-absorbing dissolved organic matter (DOM) consists of two components (A and B). Component A absorbs UV light strongly, therefore being presumed to possess aromatic chromophores and hydrophobic character, while component B absorbs weakly and can be assumed hydrophilic. The water samples in Qixing wetland were scanned by UV-visible spectra, the dissolved organic carbon (DOC) concentrations estimated by two-component model, and then the relationship between f_A (the fraction of component A) and DOM properties studied. The results showed that: the two-component model provided accurate estimates of DOC concentrations in water of Qixing wetland (rmsd=2.18mg/L, R²=0.963), the corresponding model parameter values were E_A,254=95.04 L/(g·cm), E_B,254=0.15 L/(g·cm), E_A,340=30 L/(g·cm), E_B,340=0, respectively. fA values show a declining trend with the increase of the DOC concentration. There are good linear relationships (R²>0.900) between f_A and special UV absorbance SUVA254, SUVA280. f_A can reflect the unsaturated conjugated double bonds, benzene ring compounds and aromatic compounds in DOM, but it cannot reflect the molecular weight size of the DOM. Accordingly, two-component model can be used for qualitative and quantitative analysis of DOM.