［Objective］ The pollution properties and risks of heavy metals in atmospheric dust at copper-silver mining areas were delineated to provide a scientific underpinning for ecological modeling and risk control in mining areas. ［Methods］ Atmospheric dust fall was collected using dustfall jars during the spring， summer， autumn， and winter seasons at a copper mine tailings accumulation area in Ningxia Hui Autonomous Region. Heavy metals （Cd， As， Cu， Ni， Cr， Hg， Pb， and Ag） were measured， and multiple assessments， including the single-factor pollution index， geoaccumulation index， potential ecological risk assessment， and human health risk assessment models were employed to analyze the seasonal characteristics and risks of heavy metal pollution in atmospheric dust fall. ［Results］ ① The overall atmospheric dust deposition in the study area exhibited the following ranking： spring > autumn > summer > winter， with the cumulative heavy metal content of atmospheric dust deposition exhibiting the following ranking： summer > spring > winter > autumn. As， Cu， Ni， Cr， Hg， and Ag contents were higher in spring and summer than autumn and winter. However， Cd and Pb contents were higher in autumn and winter than spring and summer. The heavy metal content of atmospheric dust deposited in spring and summer surpassed the background value in Ningxia region. ② The single-factor pollution index and geoaccumulation index indicated that Cd， Cu， Ni， Cr， Hg， Ag， and Pb in atmospheric dust exhibited varying degrees of pollution across different seasons， with Cu， Pb， and Ag showing relatively higher pollution levels and Cr showing the lowest. The potential ecological risk assessment demonstrated that the seasonal ranking was spring， summer， winter， and autumn. ③ Human health risk assessment revealed that heavy metals in atmospheric dust could cause noncarcinogenic health risks through respiratory and hand-mouth pathways， with a risk level exhibiting the following ranking： spring > summer > winter > autumn. Notably， the noncarcinogenic health risks were markedly greater in children than adults. ［Conclusion］ Heavy metal pollution in atmospheric dust in the study area has apparent seasonal properties， exhibiting distinct seasonal characteristics， with higher pollution levels in spring and summer. It is essential to control the release and dispersion of heavy metals during these seasons to mitigate their impact on the ecological environment and health of residents. Additionally， children face significantly higher non-carcinogenic health risks than adults， necessitating special attention to their health protection.