An aromatic derivative as represented by formula (I), a pharmaceutically acceptable salt thereof or a pharmaceutical composition comprising same, a preparation method therefor, and uses of the aromatic derivative and the pharmaceutically acceptable salt thereof or the pharmaceutical composition comprising same in preparing a therapeutic agent, specifically an FGFR4 tyrosine kinase inhibitor, and in preparing a medicament for treating and/or preventing neoplastic and inflammatory diseases. The substituents of formula (I) are same as defined in the description.