River-crossing underwater building foundation and river-crossing bridge tower

The invention relates to a river-crossing underwater building foundation and a river-crossing bridge tower, and belongs to the technical field of underwater buildings. Comprising a water entry foundation and a load foundation. The elevation of the underwater foundation is lower than the water level; the elevation of the load foundation is higher than the water level; the underwater foundation comprises a first foundation body and a second foundation body; the second base body inclines in the first direction and inclines in the second direction. The second foundation body comprises a load wall and a flow guide wall; a wedge-shaped structure is defined by the load wall and the flow guide wall; the load wall is an end face of the second foundation body in the second direction and is used for loading acting force of water flow; the flow guide wall is the end face of the second base body in the first direction and used for guiding water flow. The impact resistance, the structural stability and the water flow scour