Abstract: In the topsoil of a few coal resource-based cities, a consensus has emerged that the accumulation of heavy metals is closely related to magnetic susceptibility. However, the quantitative relationship between heavy metal content and magnetic susceptibility in the topsoil remains poorly understood. In order to understand the quantitative relationship between the content of heavy metals such as copper (Cu), zinc (Zn), cadmium (Cd), and mercury (Hg) in the topsoil and the magnetic susceptibility, we took the topsoil (0-20 cm) in the main urban area of Fuxin City as the research object, collected samples, and analyzed the magnetic susceptibility and heavy metal content of the soil samples. On this basis, we used mathematical-statistical, spatial interpolation, correlation, and path analyses to determine the content distribution, spatial distribution, and quantitative relationship between magnetic susceptibility and heavy metal content. The following conclusions can be drawn by this study: (1) The average values of mass susceptibility and frequency susceptibility of the topsoil in Fuxin City were 196.88×10^-8 m³/kg and 2.41%, respectively, with a relatively large numerical variation of the susceptibility. The mass susceptibility of the topsoil was mainly concentrated in the center of the main urban area (around the Haizhou strip mine) and the northwest of the main urban area. The area with high frequency susceptibility generally corresponded to the area with low mass susceptibility, and the spatial distribution pattern of frequency susceptibility showed a patchy distribution characteristic. (2) The average contents of Cu, Zn, Cd and Hg were 45.13, 107.96, 0.13, and 0.11 mg/kg, respectively, and the point source enrichment of these heavy metals was distinct. The enrichment of Cu, Zn, Cd was primarily concentrated in the central area of the main urban area with frequent economic activities and the surrounding area of the Haizhou strip mine. The enrichment area of mercury was mainly distributed along the Xihe River in the northeast-southwest direction. (3) The mass magnetic susceptibility of the topsoil in the main urban area was significantly positively correlated with the content of Cu, Zn and Cd. Also, a multiple regression relationship was observed between the mass magnetic susceptibility and the content of zinc and copper. This relationship can be expressed as χ_lf=-161.122+1.437Zn+4.729Cu. The frequency susceptibility had a significant negative correlation with the content of Zn and Cd, and a linear relationship with Cd content χ_fd=3.720-10.154Cd. The results showed obvious enrichment of heavy metals in the topsoil of the main urban area of Fuxin City and the accumulation of Cu, Zn and Cd was significantly related to the magnetic susceptibility. The magnetic susceptibility threshold can be obtained by substituting the regional background values of heavy metals into the established functional relationship equation. By comparing the measured magnetic susceptibility with the magnetic susceptibility threshold, the enrichment status of the heavy metals can be quickly predicted. In the monitoring and treatment of urban topsoil environments, it is suitable to use magnetic susceptibility tests and analyses as a simple and quick environmental indicator.