The invention relates to the technical field of foundation reinforcement structures, in particular to a foundation pile structure. A tubular foundation pile body of which a side is connected with a blade-shaped reinforcing connector replaces a traditional steel cage structure, when the foundation pile body descends into a pre-piling hole, a blade is in contact with the inner wall of a pile hole and downwards cut apart part of the inner wall of the pile hole, on the one hand, a foundation pile positioning effect is achieved, skewing caused during descending of a foundation pile is avoided, on the other hand, lateral fixation to the foundation pile is reinforced during concrete pouring, concrete is poured to the cavity of the foundation pile body by pressurization, thus, the concrete is extruded towards the side wall of the pile hole through various guide tubes to form nodular concrete, transverse supporting of the foundation pile is further reinforced, particularly, after a foundation with loess, floury soil and cohesive soil which have over high collapsibility and compressed deformation uses the foundation pile structure, the carrying performance of a foundation layer can be greatly improved, and soil mass sedimentation is avoided.