Abstract: The feasibility of treatment of municipal excess sludge was studied based on research on the ingestion and digestion of sludge by Sinotaia quadrata. Appropriated stocking density of Sinotaia quadrata, the change of the sludge properties before and after treatment by Sinotaia quadrata, and the heavy metal transfer law were investigated. The results showed that the best survival rate of Sinotaia quadrata was obtained at stocking density of 13-15 kg/m³; the municipal excess sludge could be transformed into granular manure; the organic matter in the sludge was removed effectively; and, VS and TOC removal efficiencies could reach 23% and 37% respectively. The anaerobic biogasification performance of the granular manure from the municipal excess sludge was investigated. Total biogas yield of 0.5 mL was obtained within 12 d, which indicated that the low activity of anaerobic digestion for granular manure could avoid the corruption of the sludge. The bio-concentration factors （BCF） of heavy metals for Sinotaia quadrata including Cr, Cu, Zn, Pb and Cd were 1.09, 1.36, 1.17, 1.33 and 3.41, respectively; no enrichment was detected for Ni. The contents of heavy metals in the granular manure met the control standards for agricultural use according to “Control standards for pollutants in sludge from agricultural use” （GB4284-84）. If the granular manure from the municipal sludge could meet the control standards for other pollutants, it could be used as urban green fertilizer or soil conditioner to realize resource utilization of the sludge.