The invention belongs to the field of foundation pit supporting and underground engineering, and provides a pile and wall integrated structure combining an outer wall of a basement body and a guard pile. According to the technical scheme, a narrow space is formed between the outer wall of a basement and the guard pile, in the space, a net-hanging guniting layer, a thermal insulation layer and a flexible waterproof layer are sequentially bonded to the side face of the outer wall of the basement, a force transmission plate strip is arranged on the outer side of the outer wall of the basement, the force transmission plate strip is horizontally arranged at the position of each floor of the basement, the force transmission plate strip is perpendicular to the outer wall of the basement and horizontally inserted into the surface of the net-hanging guniting layer, a foundation slab extends to the surface of the net-hanging guniting layer, the thermal insulation layer is broken at the position where the force transmission plate strip makes contact with the foundation slab, and the flexible waterproof layer continues at the position where the force transmission plate belt makes contact with the foundation slab. According to the pile and wall integrated structure, combined action of the guard pile and the outer wall of the basement at the permanent use stage is achieved, the thickness of the outer wall of the underground structure can be reduced after consideration is given to the rigidity of the guard pile, therefore, engineering investment is saved, and resources are used reasonably.