The invention relates to a triazolopyrimidine derivative, a preparation method thereof, and an application thereof in medicines. In particular, the invention relates to the triazolopyrimidine derivative represented as the general formula (I), a preparation method thereof, a medicine composition containing the derivative, and an application of the derivative as a treatment agent, especially an application as an A2a receptor antagonist, and an application in preparation of a medicine for relieving symptoms and diseases by inhibiting the A2a receptor; wherein the substituent groups in the generalformula (I) are defined as the specification.