A cover-leafing leather casing of cellular phone and a smart phone using the same are described. The cover-leafing leather casing of cellular phone comprises a leather cover for buckling to a touch panel of the smart phone. The leather cover is connected to a first magnet of a rear shell body of the smart phone by way of a magnetic induction connecting portion, and the magnetic induction connecting portion comprises a second magnet which is mutually attracted to the first magnet. The present invention employs the cover-leafing leather casing to be easily disassembled and to be conveniently cleaned.
