Abstract: The clarification of peach juice by means of chitosan was studied. The results showed that the transmittance was over 86% and soluble solid content was stable basically on the technological conditions that chitosan at 0.3~1.2g/L, temperature at 40~55℃ and pH 4.5. After the orthogonal trial, the optimum technological conditions of peach juice clarification by using chitosan were 0.4g/Lchitosan, 40℃and pH 4.5.