Highly effective techniques like Advanced Oxidation Processes (AOPs) for the removal of hazardous organic pollutants from wastewater have attracted considerable research interests due to its significant impacts on environments and ecological systems. It‘s known that the generation of reactive oxygen species (ROS), such as HO•, HO2•, O2•-, SO4•-, SO5•-, CO3•- and other radicals, in heterogeneous photocatalysis and Fenton-like processes is an efficient method for the degradation of organic pollutants (pharmaceutically active compounds, pesticides, dyes, etc.) [1]. AOPs means carrying out a catalytic experiment in one of or a multifactorial combination of conditions: when exposed to a light source (ultraviolet, visible), ultrasound, in the presence of transition metal ions (i.e., Fe2+, Fe3+, Mn3+, Mn4+, etc.) and/or nanoscale zero-valent metals (Cu, Fe, Ni, etc.) in the catalyst structure. Thus, the optimization of the conditions of AOPs, in particular, the obtaining of effective catalysts and the development of new methods for its synthesis is an urgent task. Fe-N-C composites are promising heterogeneous Fenton-like catalysts. These materials demonstrate superior catalytic activity, kinetics of destruction, high chemical stability, etc. in comparison with heterogeneous Fenton-like catalysts based on iron-containing compounds (e.g. La(Bi)FeO3 perovskites, Mfe2O4 spinel oxides, iron oxides (γ-Fe2O3, Fe3O4), oxyhydroxides (γ-FeOOH)), photocatalysts based on graphitic carbon nitride (g-C3N4). However, the data on the influence of the conditions of formation of iron-containing compounds in the graphitic carbon nitride system are fragmentary. In this work, we propose for the development of heterogeneous Fenton-like catalysts based on Fe-N-C composites and a new one-stage method for its synthesis. The combination of highly dispersed iron oxides, zero-valent iron and graphite-like carbon nitride in composites will avoid the drawbacks of catalysts based on the above individual compounds. Systematic study of the effect of synthesis conditions on the physicochemical (crystal structure, morphology, etc.) and catalytic properties of the obtained composites will make it possible to create highly efficient heterogeneous catalyst for practical applications (pharmaceutical and petrochemical industry, agro-industrial complex, municipal water treatment plants, etc.). Acknowledgements This work was supported by the Belarusian Republican Foundation for Fundamental Research and the National Natural Science Foundation of China (grant №X22КИ-018).