An electronic device comprises a principal machine, a display and a fixing part which can be fixed between the principal machine and the display, wherein the principal machine is provided with a groove; the fixing part comprises a bolt, a movable part and a clamping and fixing part; the movable part is elastically fixed on the fixing part; the bolt is provided with a locating portion and driving portions; the movable part is provided with a first chute and a locating groove; the locating portion can slide in the first chute in the first direction; the movable part can slide along the second direction vertical to the first direction to locate the locating portion in the locating groove; the clamping and fixing part is provided with chutes; and the driving portions can slide in the chutes in the first direction to drive the clamping and fixing part to be clamped and fixed in the groove of the principal machine.