Abstract: China Xinjiang high-alkali low-rank coal has the characteristics of low ash, high sodium content and high reactivity. Developing clean and efficient conversion technology for high alkali coal into high-value chemicals will have important strategic significance for solving its resources utilization and helping to achieve the “dual carbon” goal. The mineral components Na, Ca and Fe in high-alkali coal have catalytic activity in coal pyrolysis, which has a significant influence on nitrogen transformation. Currently, there is a lack of study on the interactions mechanism between mineral components in the process of fuel nitrogen thermal conversion. This study aims to elucidate the effects of intermetallic interactions on nitrogen transformation during pyrolysis of high-alkali coal. The results have significant implications for formulating control strategies of nitrogen distribution in gas, liquid and solid phases during the cascade utilization of high-alkali coal. Na, Ca, Fe mono-metal and polymetals were added to deashed coal by equal volume impregnation and sequential impregnation methods, and nitrogen transformation was studied in fixed-bed pyrolysis of high-alkali coal. GC-MS, XPS and solution absorption method were used to quantitatively analyze the effects of mono-metals and polymetals on the distribution of nitrogen-containing products from coal pyrolysis, and interactions between them were analyzed by comparing the results of experiments results with theoretical calculations results. The effect of polymetals on the nitrogen transfer pathway in pyrolysis of high-alkali coal was studied by analyzing yield/residual rate of nitrogen-containing products from coal pyrolysis. The results indicate that polymetals usually exhibit an intermetallic antagonism on the migration of nitrogen into the gas phase, with stronger inhibition of HCN, NH₃ than monometallic. The combination of Na/Ca and Fe/Ca has a synergistic effect on the conversion of N−6 and N−5 fractions of semi-tar nitrogen to heterocyclic nitrogen and amine-N of tar−N, its promotion of the production of nitrogen substances in tar is often stronger than that of monometallic. The combination of Na/Fe and Na/Fe/Ca has a synergistic effect on the transformation of nitrogen from N−6 to N−Q in the char−N, and more nitrogen is fixed.