[Objective] Effects of different plants and improvement methods on the nitrogen conversion rate of reconstructed soil were studied in order to provide a theoretical basis for improving the available nitrogen content of reconstructed soil at mining areas.[Methods] Stripping material from the Zhahanur open pit coal mine in Tongliao City, Inner Mongolia was used as the matrix to prepare reconstructed soil. Chicken manure and self-made amendments were used to improve the soil. Four types of plants were selected to study the effects of these two factors on the existing form of inorganic nitrogen, net mineralization rate, net ammonification rate, and net nitrification rate.[Results] Nitrate nitrogen was the main form of inorganic nitrogen in reconstructed soil. The effects of modifiers, plants, and their interactions on the net mineralization rate, net ammonification rate, and net nitrification rate of reconstructed soil nitrogen were very significant. The content and net nitrification rate of ammonium, nitrate, and nitrite nitrogen in reconstructed soil was improved significantly by self-made amendments. Medicago sativa significantly improved nitrate nitrogen content and the net mineralization rate of nitrogen in reconstructed soil. The net mineralization rate of nitrogen in reconstructed soil was the highest at 90 days.[Conclusion] Within 90 days after planting, the existing form of inorganic nitrogen in reconstructed soil was transformed from ammonium nitrogen to nitrate nitrogen. Adding self-made amendments improved the content of inorganic nitrogen in reconstructed soil, and increased net ammonification rate, net nitrification rate, and net mineralization rate of nitrogen in reconstructed soil at mining areas.