Double-sided offset press and offset printing method thereof

The invention discloses a double-sided offset press and an offset printing method thereof, and belongs to the technical field of offset printers. The double-sided offset press comprises a rack, and a discharging assembly used for conveying and discharging printed paper is installed at the upper end of one side of the rack; the upper end of the other side of the machine frame is provided with a paper supply assembly used for conveying fed paper materials. The rack is further provided with a double-face offset printing assembly used for conducting double-face printing on paper. The double-face offset printing assembly comprises a synchronous driving assembly, a front face impressing assembly, a back face impressing assembly and a plurality of adjusting type quick release structures. And the rack is provided with a synchronous drying assembly which is used for simultaneously drying the paper materials which are impressed by the front-surface impressing assembly and the paper materials which are impressed by the