The process and operation status of anaerobic digestion (AD) system at Pudong liming organic waste treatment plant wer summarized and analyzed in about 1 year period. The results showed that the semi-dry AD was fit for high solid content food waste. The annual average organic VS loading and SCOD of the AD system were 2.31kg VS/ (m3?d) and 7577mg/L, respectively, when the TS content of the biogas feedstock maintained 10% to 20%. The pH and NH4+-N of the AD system changed smoothly, and all the VFA/ALK values were less than 0.11. The obtained average VS degradation rate of the food waste in the AD reactor reached 85.40%. The average biogas yield of the food waste was 672.09Nm3/tVS. All the operation indexes of the AD system were good, which provides some reference for other food waste treatment projects.