Provided are an aminopyrimidine compound as shown in formula (I), a polymorph, a pharmaceutically acceptable salt, a prodrug, a stereoisomer, an isotope variant, a hydrate or a solvate thereof, and a pharmaceutical composition comprising same and the use thereof. The aminopyrimidine compound and the composition comprising same have excellent inhibition to protein kinases, and at the same time have better pharmacokinetic parameter characteristics, and can improve the drug concentration of the compound in animals, and thereby improve the efficacy and safety of the drug.