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Ionic liquid have received much attention for its environmentally friendly and recyclable in recent years. In this paper, imidazole ionic liquid, [Amim]Cl and [Bmim]Cl were chosen as solvent to dissolve bamboo pulp. And different conditions were discussed during the dissolve process, i.e. the dependence of polymerization degrees (DP) on storage and dissolving temperature, time and anti-oxidizer etc. Conclude that the fittest temperature of bamboo pulp dissolved in [Amim]Cl or [Bmim]Cl is about 100°C; impact of temperature is prominence during the dissolving process; degradation of bamboo pulp in [Amim]Cl is more severe than [Bmim]Cl; chosen anti-oxidizer, Propyl gallate and Hydroquinoe, seems can't restrain the degradation of bamboo pulp; and no matter what condition, polymerization degrees present more or less descending tendency. [ABSTRACT FROM AUTHOR]