[Objective] The characteristics and mechanism of Mn enrichment of dominant plants in two types of manganese residue disposal sites (manganese mine residue and electrolytic manganese residue) were analyzed, in order to provide useful theoretical information to benefit the ecological restoration of manganese residue disposal sites. [Methods] On the basis of field investigation, Mn content of dominant plants, total Mn content of growth matrix and low molecular weight organic acid extracted Mn content were detected. [Results] Mn content in dominant plants ranged from 34.47 mg/kg to 680.70 mg/kg. Mn content in individual plant tissues exceeded the normal range of general plants. The distribution of Mn in plant organs was as follows: root>leaf>stem or branch. The content of total Mn in the growth matrix of dominant plants ranged from 20 217.14 mg/kg to 75 115.58 mg/kg, and the rhizosphere matrix was less than that of non-rhizosphere. The extraction efficiency of Mn from matrix by low molecular weight organic acids ranged from 25.72% to 78.30%, and the overall performance was rhizosphere matrix>non-rhizosphere matrix. [Conclusion] Under the dual effects of plant absorption and rhizosphere effect, the dominant plants in manganese residue disposal sites have the potential to control Mn pollution.