To investigate the causes of turbidity and sedimentation in Chinese rice wine,haze proteins were obtained through the absorbing effects in the rice wine and precipitate.The hydrolysis amino acids of both the haze proteins and the precipitate were analyzed by amino acid auto-analyzer.The results show that the haze protein in rice wine is composed mainly of glutamic(41.33%),proline(18.66%) and phenylalanine(9.56%),haze protein in the precipitate is composed of luctamic(12.39%),aspartic(11.32%) and leucine(8.02%) and those in the precipitate is composed of glutamic(16.57%),aspartic(10.91%) and leucine(7.14%).A conclusion can be drawn that glutamic acid is the main amino acid of haze proteins that caused the turbidity and sedimentation of rice wine.