The clarification of grape juice by means of chitosan was studied.The results from the test of single factor showed that the optimum chitosan amount,temperature,pH and clarification time was 0.6~0.8g/L,50~70℃,3.49 and 40~60min respectively for clarification of grape juice.The results from the orthogonal test showed that the optimum technological condition for clarification of grape juice was adding 0.8 g/L chitosan at 60℃for 50min and its transmittance of the clarified grape juice was up to 92.3%.Comparing with the original grape juice,the contents of soluble solids,pH were almost the same after clarification.Removing both the pectin and some proteins improved the stability of grape juice.