Foundation pile loading and node connecting method

The invention discloses a foundation pile loading and joint connecting method. The method comprises the steps that an upper structure is connected to a foundation pile in a first connecting mode so that the upper structure can be in a movable state relative to the foundation pile, and a first load is applied to the upper structure; first internal force of the foundation pile in the movable state is calculated based on the first load; the upper structure is adjusted from the movable state relative to the foundation pile to a fixed state; a second load is applied to the upper structure; and based on the second load, second internal force of the foundation pile in the fixed state is calculated, and the first internal force and the second internal force are superposed to obtain target internal force of the foundation pile, wherein and the sum of the first load and the second load is equal to all loads borne by the upper structure when the upper structure is fixed relative to the foundation pile. By adopting the m