Deuterated diaminopyrimidine compounds and pharmaceutical compositions containing such compounds are described. In particular, disclosed are deuterated diaminopyrimidine compounds of formula (I), and pharmaceutical compositions containing such compounds or crystal forms, pharmaceutically acceptable salt, hydrates or solvates thereof. The disclosed deuterated diaminopyrimidine compounds can be used for treating and/or preventing protein kinase-associated diseases, such as cell proliferative disease, cancer, immune disease and the like.