The invention provides a high-speed paper cup externally-sticking machine. A worktable plate is provided with a multi-station paper piece rotating tower and a multi-station paper cup rotating tower; the multi-station paper piece rotating tower comprises a paper picking station, am embossing station, a gluing station and a hooping and clamping station; the multi-station paper cup rotating tower comprises a cup feeding station, a hooping and clamping station and a cup discharging station; a rotary type paper sucking mechanism is arranged at the cup feeding station; an externally-sticking paper piece conveying rack matched with the rotary type paper sucking mechanism is arranged at the worktable plate; a 3D embossing mechanism is arranged at the embossing station; a gluing mechanism is arranged at the gluing station; a hooping and clamping mechanism is arranged at the hooping and clamping station; an inner cup feeding mechanism is arranged at the cup feeding mechanism; and a discharged cup turnover mechanism is arranged at the cup discharging station. The high-speed paper cup externally-sticking machine provided by the invention can be used for automatically producing externally-stuckpaper cups at a high speed and has the advantages of high automation degree, high efficiency, stable quality and the like. In a production process, the steps such as feeding of paper pieces, embossing treatment, gluing, feeding of paper cups, hooping, clamping and sticking of an externally-stuck paper piece on an inner cup, discharging of the externally-stuck paper cups and the like are integrated.