A heteroaryl[4,3-c]pyrimidin-5-amine derivative, a preparation method therefor, and medical uses thereof. Specifically, a heteroarylo[4,3-c]pyrimidin-5-amine derivative represented by a general formula (I), a preparation method therefor, a pharmaceutical composition containing the derivative, and uses thereof as therapeutic agents, in particular, a use as a A2a receptor antagonist and A use in preparation of a medicament for treatment of conditions or symptoms that are ameliorated by inhibiting the A2a receptor； various substituent groups in the general formula (I) have the identical meanings as those in the specification.
