The present invention relates to a fused ring-containing oxazolidinone compound shown by general formula (I), a pharmaceutically acceptable salt thereof and a stereoisomer thereof, wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, A, B and C are as defined in the description. The present invention further relates to a method for preparing the compound, a pharmaceutical composition and a pharmaceutical formulation comprising the compound, and a use of the compound for the manufacture of a medicament for the treatment and/or prevention of infectious diseases and a use for the treatment and/or prevention of infectious diseases.