The invention relates to a salt, a hydrate or a crystalline form of an EGFR inhibitor, and use thereof. Specifically it relates to 4-[(3-chloro-4-fluorophenyl)amino]-7-methoxy-6-[3-[(1R,6S)-2,5-dioxa-8-azabicyclo [4.3.0] nonan-8-yl] propoxy] quinazoline dimethanesulfonate, hydrate and a crystalline form thereof； the invention also relates to a preparation method of the crystalline form disclosed herein, a pharmaceutical composition containing the crystalline form, and uses thereof for treating proliferative disorders.
