To　select　the　process　for　source　water　with　organic　micro-pollution,　the　annual　changes　of　organic　content,　specific　ultraviolet　absorbance　(SUVA),　disinfection　by　products　formation　potential(DBPFP),　molecular　mass　distribution,　taste　and　odor　were　all　analyzed　in　a　micro-polluted　reservoir,　which　took　water　from　the　downstream　of　the　Yellow　River.　Results　showed　that　the　organic　contents　changed　slightly　throughout　the　year,　and　the　average　of　oxygen　consumption,　UV254,　DOC　were　2.32　mg/L,　0.045　cm-1,　2.32　mg/L,　respectively.　However,　the　SUVA　was　higher;　small　organic　molecules　was　the　most,　mainly　to　70%　of　it　(<3　ku);　DBPFP　was　also　higher,　and　THMs　accounted　for　94.6%　of　DBPFP,　with　CHCl3　accounted　for　77%.　The　2-methylisoborneol　(2-MIB)　concentration　changed　with　season,　which　accorded　to　the　alcohol　content　and　metabolized　by　Cyanobacteria,　such　as　Planktonema,　Oscillatoria,　etc.　The　organics　characteristics　of　the　reservoir　water　were　associated　with　HRT　of　the　process　of　sand　setting,　storage　from　the　Yellow　River　and　its　sources　of　organic　matters.　Ozone　biological　activated　carbon　process　was　appropriate　to　be　used　for　treatment.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.