This invention discloses a foldable computing device, comprising: a first body having a bottom shell with at least one through hole and at least one movable sub-circuit board on the bottom shell, the sub-circuit board having at least one input / output interface corresponding to the through hole; a second body pivotally connected to the first body via a pivot; and a telescopic interface mechanism drivenly connected to the pivot. When the first body and the second body are folded or unfolded via the pivot, the telescopic interface mechanism drives the input / output interface on the sub-circuit board to retractably engage with the through hole. This invention achieves linkage between the opening / closing of the foldable computing device and the input / output interface through the telescopic interface mechanism. This telescopic interface mechanism employs a simple and easy-to-use design, providing a product appearance with good overall integrity and novelty.
