A　campaign　of　sampling　atmospheric　precipitation　and　particulate　matter　samples　in　Beijing　in　both　spring　and　summer　of　2015　was　carried　out　to　investigate　the　physical　and　chemical　characteristics,　temporal　and　spatial　variations　and　sources　of　precipitation　and　its　impacts　on　atmospheric　particulate　matter.　A　large　amount　of　rainfall　in　spring　and　summer　mostly　occurred　in　summer.　The　volume-weighted　mean　(VWM)　pH　value　of　rainwater　in　the　south　of　Beijing　in　spring　and　summer　was　6.26,　a　little　higher　than　that　of　6.08　in　the　north,　indicating　that　the　rainwater　in　Beijing　was　largely　non-acidic.　At　the　same　time,　the　VWM　pH　in　spring　was　higher　than　that　in　summer　in　Beijing.　The　concentrations　of　major　crustal　elements　in　rainfall　such　as　Al　and　Fe,　were　relatively　high,　while　Ti,　V　and　Ce　were　relatively　low.　The　concentrations　of　major　pollution　elements　in　rainwater　such　as　Ca　and　S,　were　much　high,　Na　and　Mg　were　relatively　high,　but　Zn,　Mn,　Cu,　Sr,　Pb　and　Ni　were　relatively　low,　of　which　Na,　Mg,　Sr　and　Ni　were　lightly　enriched　in　rainwater,　Ca,　Mn　and　Pb　were　enriched,　and　Cu,　Zn　and　S　were　heavily　enriched　in　rainwater.　Furthermore,　the　concentrations　of　major　elements　in　rainwater　displayed　the　significant　seasonal　variations,　of　which　the　concentration　of　secondary　pollution　element　S　in　summer　was　higher　than　that　in　spring,　while　the　concentrations　of　the　others　in　spring　were　higher　than　those　in　summer.　The　important　spatial　variations　of　major　elements　in　rainwater　have　been　shown,　of　which　the　concentrations　of　major　elements　in　the　south　of　Beijing,　except　for　Pb,　were　higher　than　those　in　the　north.　The　chemical　compositions　of　precipitation　were　mainly　from　crustal　dust,　construction　activities,　coal　combustion,　vehicle　emission　and　industrial　emission.　The　scavenging　effect　of　precipitation　to　aerosol　particles　and　their　components　from　the　air　was　generally　impacted　by　the　rainfall　intensity　and　the　concentrations　of　pollutants　before　precipitation　events.　The　precipitation　could　effectively　scavenge　pollution　elements　in　fine　particle　PM2.5,　such　as　Cu,　Zn,　Mn　and　Na,　and　crustal　element　Al,　and　Mg　and　Ca　from　construction　dust　in　coarse　particle　PM10.　©　2017,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.