Disclosed are C-aryl glucoside derivatives, preparation processes and pharmaceutical uses thereof, especially C-aryl glucoside derivatives represented by formula (I), pharmaceutical salts or all stereoisomers thereof, their preparation methods, pharmaceutical compositions containing the derivatives and their uses as therapeutic agents, especially as sodium-dependent glucose cotransporter(SGLT)- 1 inhibitors, wherein each substituent of formula (I) is defined in the specification. (see formula I)