The invention discloses an efficient dissolving method for fermented chitin. The efficient dissolving method for fermented chitin comprises the following steps: (1) weighing a certain amount of chitinby using a scale for subsequent use; (2) pulverizing the weighed chitin in a pulverizer for 5-15 minutes to enable the chitin to be pulverized uniformly for subsequent use; (3) soaking the powder obtained from step (2) in pure water at the temperature of 10-25 DEG C for 10-30 minutes for subsequent use; and (4) preparation of a solvent for dissolving the chitin: adding 3-9% by mass of a cosolventin concentrated sulfuric acid of which the weight percentage concentration is 95-100% to obtain a chitin solvent for subsequent use. According to the efficient dissolving method for fermented chitin,the cosolvent with the mass percentage of 2.5-10% is added when the chitin is dissolved, thus, the dissolving speed is increased effectively, meanwhile, water among chitin molecules is removed favorably, the problems that the chitin is large in degradation in a dissolving process, and thus, production is unstable are solved, and thus, convenience and safety are achieved when the chitin is dissolved by people.