To study the chemical composition of fresh juice precipitate from Phyllanthus emblica and the extraction and purification process of resource material ellagic acid.Methods:The precipitate of fresh juice of P.emblica was collected，and the chemical composition of its fresh juice precipitate was analyzed by energy dispersive spectrometer(EDS)，Fourier transform infrared spectroscopy(FT-IR)，and ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS).Taking the content of ellagic acid as the index，the extraction and purification of ellagic acid were carried out by alcohol extraction，enzyme extraction，and alkali-solution-acid sedimentation method，and the extraction process was optimized by the single-factor experiment.Results:Infrared analysis showed that the fresh juice precipitate of P.emblica mainly contained C and O elements，benzene ring，phenolic hydroxyl group，and other basic structures.The results of UPLC-Q-TOF-MS showed that the main components were ellagic acid and dibutyl phthalate，and the proportion of ellagic acid was the highest(39.91%).The optimized extraction process results showed that the alkali-solution-acid sedimentation method was the superior technology，and the optimal parameters were 1:40 of solid-liquid ratio，2% of NaOH concentration，and 20 min of ultrasonic extraction time.Under these conditions，the content of ellagic acid in the extract was 47.38%，and the purity was 94.22%.The results of scanning electron microscopy showed that there were a large number of columnar crystals in the extract powder of ellagic acid，which were presumably formed by the planar polymerization of ellagic acid molecules.Conclusion:The natural abundance of ellagic acid in the fresh juice precipitate of P.emblica is high，which can be used as one of the natural sources of ellagic acid.The extraction and purification process of ellagic acid obtained in this study is simple and feasible with low cost，high content，and high purity，which is suitable for the enrichment of ellagic acid in the fresh juice precipitate of P.emblica.