Inhibitor for sodium-glucose co-transporter 2, preparation method and pharmaceutical composition thereof, and application of inhibitor and pharmaceutical composition

The invention discloses an inhibitor for sodium-glucose co-transporter 2 (SGLT2), a preparation method and a pharmaceutical composition thereof, and application of the inhibitor and the pharmaceutical composition. Specifically, the invention discloses the SGLT2 inhibitor with a general formula (I) as described in the specification and pharmaceutically acceptable salts thereof, preparation process of the SGLT2 inhibitor, the pharmaceutical composition containing the inhibitor with the general formula (I) as described in the specification, and application of the inhibitor and the pharmaceutical composition in antidiabetic aspects.