The present invention provides pyrazolopyrimidone or pyrrolotriazone derivatives, method of preparing same, and pharmaceutical applications thereof. Specifically, the present invention provides pyrazolopyrimidone or pyrrolotriazone derivatives represented by a general formula (I) and pharmaceutical salts thereof, method of preparing same, and use thereof as a gonadotropin releasing hormone (GnRH) antagonist and especially as therapeutic agents for endometriosis, where the definitions of the substituents in the general formula (I) are the same as the definitions in the specification.
