Provided is an electric folding side hung door. The electric folding side hung door is characterized by comprising a first door row and a second door row, wherein the first door row and the second door row are hinged to each other, one side of the first door row is connected with a first fixed stand column in a rotary mode, a motor driving device is connected between the first door row and the first fixed stand column and is used for driving the first door row to rotate around the first fixed stand column, and an oscillating bar device is connected between the stand column and the first door row and/or the second door row and is used for driving the second door row to reversely rotate relative to the first door row; therefore, when the electric folding side hung door is opened or closed, the first door row is driven by the motor driving device to rotate around the first fixed stand column, the first door row drives the second door row to swing in the direction opposite to the rotation direction of the first door row through the oscillating bar device, the second door row and the first door row are arranged in a linear mode, and the electric folding side hung door is in a closed state or in the opened mode that the first door row and the second door row are folded mutually. When the electric folding side hung door is closed, the first door row and the second door row are folded to one side of a passage, and only occupy a space with the size of the sum of the thicknesses of two door bodies, and the width of the passage cannot be influenced due to the fact that the occupied space is small.