Novel PDGFR kinases inhibitor and purpose thereof

The invention provides a novel PDGFR kinases inhibitor, which comprises a compound shown in a formula (I) or its pharmaceutical acceptable salt, a solvate, ester, acid, a metabolite, or a prodrug. Theinvention also provides a purpose of the compound shown in the formula (I) for preventing or treating PDGFR kinase activity-related illness and a method thereof, especially the PDGFR alpha kinase activity-related illness.