Permanent supporting system with basement floor and supporting piles capable of working together

The invention discloses a permanent supporting system with a basement floor and supporting piles capable of working together. The system comprises the foundation pit supporting piles, horizontal outward-extending supports, a waist beam and other components, wherein the horizontal outward-extending support, the waist beam and the other components are attached to a structure of the basement floor. In the excavating stage of the foundation pit, pre-stressed anchor cables are adopted by the supporting piles for anchorage; in the construction stage of a basement, the permanent outward-extending supports are arranged to replace anchor rods to bear horizontal action force of the supporting piles; and the supporting structure system can permanently play a role along with a main structure. The permanent supporting system serves as a new underground space supporting system to convert a temporary foundation pit supporting structure into the permanent underground supporting structure, material performance is fully utilized, the construction cost is reduced, and the underground environment can be protected.