Wall high-precision building block

The utility model discloses a high-precision building block for a wall body, and belongs to the technical field of building blocks. The building block comprises a building block body, a plurality of pouring cavities are evenly formed in the building block body, a cutting positioning gap hole is formed between every two adjacent pouring cavities, and the upper end and the lower end of the building block body are correspondingly provided with positioning protrusions and positioning grooves located on the front sides and the rear sides of the pouring cavities respectively. According to the building block, the five-hole type design is adopted, and the cutting positioning gap holes are designed between the adjacent pouring cavities, so that the building block can be accurately cut, the problem that the pouring holes of the building blocks on the upper layer and the lower layer cannot be completely matched after cutting is also avoided, the situations of slurry leakage and slurry leakage are avoided, a complete cor