The invention relates to an integral load-bearing, thermal-insulation heat-preservation wall body structure, which consists of various prefabricated brick bodies, wherein various prefabricated brick bodies comprise straight bricks, left external corner bricks, right external corner bricks, left internal corner bricks and right internal corner bricks. Various brick bodies are all made of two kinds of foaming concrete with high density and low density through composite casting, the straight bricks consist of two kinds of cuboids with different densities, each corner brick consists of two cuboids with two different densities and the included angle of 90 degrees, and the boundary of two densities of the two adjacent surfaces forms a step to be used as a mortar layer during the construction. Four surfaces constructed by the cuboids with small density are all provided with semicircular lug bosses or grooves, wherein two sides are provided with the lug bosses, and the other two sides are provided with the grooves. The integral load-bearing, thermal-insulation heat-preservation wall body structure is prepared from cement, industrial residue, various aggregates, foaming agents and additives through different-density recipe adoption, mixing, stirring and foaming composite casting, and can be matched to be manufactured with in-site casting elements. The invention aims at providing an integral building structure, which is suitable for various wall body structures and has integrated dual function of one-step construction, load bearing and external wall thermal insulation and heat preservation. The invention has the characteristics of heat preservation effect and no exfoliation of external wall, no cold bridge, no blistering phenomenon, convenient construction, high efficiency and low cost, and belongs to a novel environment protection and energy saving construction product.