Abstract: The parameters during the dissolving of chitosan,such as the kind of solvent,the size of chitosan and the reaction temperature and time,affecting the viscosity and acidity of the chitosan solution was investigated.It could be found that both the dissolving of chitosan and the degradation of the dissolved chitosan occurred.The effect of temperature and time on the degradation of chitosan during storage was also researched.The degradation regularity of chitosan was discussed when the chitosan was dissolved and stored.The experiments provided the base of preparation of chitosan solution for many fields such as immobilized enzyme and ofhers.

Key words: Chitosan Degradation Solving Storage