Concrete block, concrete block outer mold, block assembly and block assembly outer mold

The invention provides a concrete block, a concrete block outer mold, a block assembly and a block assembly outer mold. The concrete block comprises a first horizontal half-groove, a second horizontal half-groove, a first longitudinal half-groove and a second longitudinal half-groove; the first horizontal half-groove is formed in the top surface of the concrete block, penetrates through the left side face, in the length direction of the concrete block, of the concrete block, and do not penetrates through the right side face of the concrete block; and the second horizontal half-groove is formed in the bottom surface of the concrete block, penetrates through the left side face, in the length direction of the concrete block, of the concrete block, and do not penetrates through the right side face of the concrete block. The concrete block, the concrete block outer mold, the block assembly and the block assembly outer mold solve the problem of the design of concrete prefabricated parts. 本发明提供种混凝土砌块、混凝土砌块外模具及砌块组件、砌