The　phenomenon　of　carbon　resource　insufficiency　is　a　common　problem　in　municipal　wastewater.　In　this　study,　primary　sludge　which　came　from　primary　sediment　was　used　for　generating　carbon　resource　by　anaerobic　hydrolysis　acidification　process.　In　the　condition　of　35C,　HRT=28　h　and　SRT=3　d,　ρ(SCOD)　and　ρ(VFA)　of　effluents　reached　the　peak　value　at　975.8　mg/L　and　516.4　mg/L　during　the　operation　time.　When　the　alkalinity　was　725　mg/L　and　pH　was　7.12,　hydrolysis　acidification　process　could　keep　the　stable　state　of　hydrolysis　acidification　efficiency.　Appropriate　alkalinity　and　pH　value　were　the　key　parameters　of　hydrolysis　acidification　process　for　stable　operation.　When　the　hydrolysis　acidification　process　was　fluctuated,　the　changes　of　ρ(SCOD)　and　VFA　were　previous　to　the　alkalinity　and　pH　value.