The　physicochemical　properties　and　heavy　metal(loid)　concentrations　of　the　river　water　both　fluctuate　greatly　along　the　river　affected　by　mining　activities,　and　the　transportation　of　heavy　metal(loid)s　is　therefore　more　complicated　than　unpolluted　river.　Dissolved　and　particulate　heavy　metal(loid)s　in　a　river　polluted　by　mining　activities　were　measured　to　study　their　temporal-spatial　variation　and　partitioning.　The　concentrations　of　dissolved　arsenic　(As),　cadmium　(Cd),　manganese　(Mn),　nickel　(Ni),　lead　(Pb),　and　zinc　(Zn)　were　considerably　high　at　the　sites　near　the　mine　area.　Notably,　dissolved　As　at　most　sites　were　higher　than　the　Chinese　quality　criterion　of　class　II　for　surface　water　indicating　high　environmental　risk.　Mn　and　Pb　at　most　sites　and　Ni　at　a　part　of　the　sites　mainly　existed　in　the　particulate　phase.　For　other　heavy　metal(loid)s,　i.e.,　As,　Cd,　chromium　(Cr),　and　Zn,　the　particulate　phase　was　extremely　high　at　the　sites　near　the　mine　area　and　responsible　for　heavy　metal(loid)　transport.　Significant　correlations　between　particulate　heavy　metal(loid)s　and　temperature　and　electrical　conductivity　(EC)　were　found.　However,　the　partitioning　of　heavy　metal(loid)s　did　not　significantly　relate　to　the　river　water　properties,　due　to　most　heavy　metal(loid)s　in　suspended　particulate　matter　(SPM)　are　stable　and　affected　less　by　water　properties.　Except　for　Cr　and　Ni,　other　heavy　metal(loid)s　showed　high　concentrations　in　sediments,　and　considerable　Cd,　Mn,　and　Zn　existed　in　exchangeable　and　carbonate　fraction　indicating　high　environmental　risk.　The　environmental　assessment　of　SPM　showed　that　Cd,　Zn,　and　As,　as　the　main　pollutants　in　SPM,　all　reached　extremely　polluted　level　at　the　sites　near　the　mine　area,　and　the　environmental　risk　of　heavy　metal(loid)s　in　SPM　was　higher　during　dry　season　than　that　during　wet　season.　The　results　can　contribute　to　understanding　the　partitioning　and　transportation　of　heavy　metal(loid)s　in　the　river　affected　by　mining　activities.