The present invention discloses a conveniently demountable assembled lamp. It is mainly composed of stand columns and clapboards, and multiple clapboards divide the stand columns into up and down multiple layers. At least one layer of the lamp is provided with a fixing frame, and a lampshade is connected between the fixing frame and the clapboard at the bottom of the layer; the lampshade is composed of a lampshade top frame, a soft outside cover and a lampshade bottom frame; locating pins extend from the lampshade top frame, and the fixing frame is provided with corresponding locating pin grooves; a central ring is additionally arranged at the central part of the lampshade bottom frame, and at least three support bars are connected between the central ring and the lampshade bottom frame; the lampshade bottom frame is arranged at the clapboard at the bottom of the layer, and the lampshade top frame is located at the inner side of the fixing frame; the locating pins of the lampshade top frame are jammed into the corresponding locating pin grooves of the fixing frame; the center of the clapboard at the bottom of the layer is further provided with a clapboard center hole corresponding to the central ring; a lampholder is mounted to the clapboard center hole and passes through the central ring. The assembled lamp is conveniently demountable, is convenient for daily cleaning, storage and maintenance, can improve the assembly efficiency and be convenient for transportation, and concurrently has multiple functions and strong aesthetic appearance.