[Objective] The primary cause of eutrophication of landscape water is too much N and P in the water body. It is, therefore, key to control of landscape water eutrophication to reduce N and P concentrations in the water body. Studies have shown that total nitrogen(TN) and total phosphorus(TP) in landscape water can be effectively removed with the complex of purple parent rock and polymeric ferric sulfate (PFS). However, it is still unclear how the complex looks like in micro-structure and how it removes TN and TP from landscape water. [Method]Morphological structure of the complex of J₃p purple parent rock and ferric sulfate (J₃p+PFS) was explored with electron microscopic scanning, energy spectrum analysis, infrared spectrum analysis and X-ray diffraction, and mechanism its removing total nitrogen and total phosphorus through analysis of isothermal curves of the adsorption of total nitrogen and total phosphorus by J₃p, zeta potential of the system, fractal dimension, and changes in content of chlorophyll a.[Result] Electron microscopic scanning and energy spectrum analysis shows that once J3p and PFS formed into complex, larger in agglomerate structure, more fluffy in surface and roughly the same as J₃p in elemental structure, but changed in content of metal elements. Infrared spectroscopy and X-ray diffraction shows that changes occurred in composition of its internal material and functional groups, thus turning the complex into new hydroxyl-bridged iron polymers. Isothermal adsorption experiments show that TN adsorbed on J₃p was in the form of a monolayer on the surface, while TP adsorbed mainly in the form of a monolayer, with maximum theoretical adsorption capacity being 0.259 mg•g^-1 and 0.619 mg•g^-1, respectively. Zeta potential of the system increased dramatically after it was treated with J₃p + PFS, but still below 0, which indicates that the use of J₃p + PFS integrates the advantages of PFS neutralizing charges, and of J3p adsorbing N and P. Once landscape water was treated with J₃p, PFS, or J₃p + PFS, TN, TP and chlorophyll-a concentrations in the water all reduced. However, J₃p + PFS shows the highest capacity of removing TN, TP, and chlorophyll-a. Moreover, fractal dimension of the system was higher after treatment with J₃p + PFS than after treatment of J₃p or PFS. All the findings demonstrate that J₃p+ PFS promotes aggregation of chlorophyll-a, which precipitates in tiny particles in the water, thus reducing the content of chlorophyll-a and hence the contents of TN and TP. [Conclusion] The complex of J₃p+PFS integrates the effect of PFS neutralizing charges and that of J₃p adsorbing N and P, so it can achieve rapid and efficient removal of total nitrogen and total phosphorus from landscape water. The complex can removal of TN and TP from landscape water by 53.53% and 86.48%, respectively, in 3 hours after the treatment.