A power and data plug-in connection assembly for a light-emitting diode display device, comprising: a first plug-in connection member suitable to be arranged at a first side plate of a first box of a LED box assembly of the LED display device; a second plug-in connection member spaced apart from the first plug-in connection member and suitable to be arranged at a second side plate of a second box of the LED box assembly of the LED display device; characterized in that, the power and data plug-in connection assembly further comprises: an intermediate structure arranged between the first plug-in connection member and the second plug-in connection member, wherein the intermediate structure comprises a third plug-in connection member and a fourth plug-in connection member that are spaced apart from each other, and a driving member for driving the third plug-in connection member and the fourth plug-in connection member to move, and the third plug-in connection member and the fourth plug-in connection member are connected with each other by a wire; wherein the driving member has an initial position and a pushing position; when the driving member is in the initial position, the third plug-in connection member and the fourth plug-in connection member are close to each other, the third plug-in connection member is separated from the first plug-in connection member, and the fourth plug-in connection member is separated from the second plug-in connection member; and when the driving member is in the pushing position, the third plug-in connection member and the fourth plug-in connection member are away from each other, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner. a first plug-in connection member suitable to be arranged at a first side plate of a first box of a LED box assembly of the LED display device; a second plug-in connection member spaced apart from the first plug-in connection member and suitable to be arranged at a second side plate of a second box of the LED box assembly of the LED display device; characterized in that, the power and data plug-in connection assembly further comprises: an intermediate structure arranged between the first plug-in connection member and the second plug-in connection member, wherein the intermediate structure comprises a third plug-in connection member and a fourth plug-in connection member that are spaced apart from each other, and a driving member for driving the third plug-in connection member and the fourth plug-in connection member to move, and the third plug-in connection member and the fourth plug-in connection member are connected with each other by a wire; wherein the driving member has an initial position and a pushing position; when the driving member is in the initial position, the third plug-in connection member and the fourth plug-in connection member are close to each other, the third plug-in connection member is separated from the first plug-in connection member, and the fourth plug-in connection member is separated from the second plug-in connection member; and when the driving member is in the pushing position, the third plug-in connection member and the fourth plug-in connection member are away from each other, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner. an intermediate structure arranged between the first plug-in connection member and the second plug-in connection member, wherein the intermediate structure comprises a third plug-in connection member and a fourth plug-in connection member that are spaced apart from each other, and a driving member for driving the third plug-in connection member and the fourth plug-in connection member to move, and the third plug-in connection member and the fourth plug-in connection member are connected with each other by a wire; wherein the driving member has an initial position and a pushing position; when the driving member is in the initial position, the third plug-in connection member and the fourth plug-in connection member are close to each other, the third plug-in connection member is separated from the first plug-in connection member, and the fourth plug-in connection member is separated from the second plug-in connection member; and when the driving member is in the pushing position, the third plug-in connection member and the fourth plug-in connection member are away from each other, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner.