The invention discloses a multi-module automatic dismounting and mounting lifting mechanism and a lifting method. The mechanism comprises an automatic transverse moving mechanism, an automatic liftingmechanism and multiple modules; the automatic transverse moving mechanism comprises an automatic horizontal moving device and a tray; the tray is arranged on the automatic horizontal moving device, and is used for containing the modules, and the automatic lifting mechanism comprises an automatic vertical motion device and a lifting positioning plate, the lifting positioning plate is arranged on the automatic vertical motion device, multiple first male and female abut-joint devices are fixedly arranged on the upper surface of the lifting positioning plate, a fixing mechanism is arranged on theautomatic vertical motion device, the modules are of frame structures, multiple second male and female abut-joint devices are arranged on the lower end of each module, and multiple third second maleand female abut-joint devices are arranged on the upper end of each module. The lifting mechanism is combined with the automatic transverse moving mechanism, the multiple modules can be automaticallydismounted and mounted, the problem that a current high-altitude work lifting mechanism shakes at high altitude is solved, and the potential safety hazards of manual dismounting and mounting can be removed.