A portable electronic device (10, 20, 30), comprising: a base (112, 212, 312); a first display (110, 210, 310) pivotally connected to the base (112, 212, 312), wherein the first display (110, 210, 310) is movable to be opened or closed relative to the base (112, 212, 312); a second display (114, 214, 314) located between the base (112, 212, 312) and the first display (110, 210, 310); and a linkage mechanism (116, 216, 316) comprising at least one first link (1161, 2161, 3161), wherein two ends of the first link (1161, 2161, 3161) are pivotally connected to the first display (110, 210, 310) and the second display (114, 214, 314), respectively, wherein when the first display (110, 210, 310) is opened relative to the base (112, 212, 312), the at least one first link (1161, 2161, 3161) rotates to drive the second display (114, 214, 314) to move up relative to the base (112, 212, 312), and when the first display (110, 210, 310) is closed relative to the base (112, 212, 312), the at least one first link (1161, 2161, 3161) rotates in an opposite direction to drive the second display (114, 214, 314) to move down to be accommodated between the first display (110, 210, 310) and the base (112, 212, 312); characterized in that the linkage mechanism (116, 216) further comprises at least one second link (1162, 2162), wherein two ends of the second link (1162, 2162) are pivotally connected to the second display (114, 214) and the base (112, 212), respectively, and when the first display (110, 210) is closed relative to the base (112, 212), the at least one first link (1161, 2161) and the at least one second link (1162, 2162) rotate in an opposite direction to drive the second display (114, 214) to move down to be accommodated between the first display (110, 210) and the base (112, 212). a base (112, 212, 312); a first display (110, 210, 310) pivotally connected to the base (112, 212, 312), wherein the first display (110, 210, 310) is movable to be opened or closed relative to the base (112, 212, 312); a second display (114, 214, 314) located between the base (112, 212, 312) and the first display (110, 210, 310); and a linkage mechanism (116, 216, 316) comprising at least one first link (1161, 2161, 3161), wherein two ends of the first link (1161, 2161, 3161) are pivotally connected to the first display (110, 210, 310) and the second display (114, 214, 314), respectively, wherein when the first display (110, 210, 310) is opened relative to the base (112, 212, 312), the at least one first link (1161, 2161, 3161) rotates to drive the second display (114, 214, 314) to move up relative to the base (112, 212, 312), and when the first display (110, 210, 310) is closed relative to the base (112, 212, 312), the at least one first link (1161, 2161, 3161) rotates in an opposite direction to drive the second display (114, 214, 314) to move down to be accommodated between the first display (110, 210, 310) and the base (112, 212, 312); characterized in that the linkage mechanism (116, 216) further comprises at least one second link (1162, 2162), wherein two ends of the second link (1162, 2162) are pivotally connected to the second display (114, 214) and the base (112, 212), respectively, and when the first display (110, 210) is closed relative to the base (112, 212), the at least one first link (1161, 2161) and the at least one second link (1162, 2162) rotate in an opposite direction to drive the second display (114, 214) to move down to be accommodated between the first display (110, 210) and the base (112, 212).