Concrete block , outer mould of concrete block and building block subassembly, outer mould of building block subassembly

The utility model provides a concrete block, outer mould of concrete block and building block subassembly, outer mould of building block subassembly, wherein concrete block includes half recess of first level, half recess of second level, first vertical half recess, vertical half recess of second, half recess of first level sets up in the top surface of building block, half recess of first level pierces through the left surface that concrete block follows building block length direction, does not pierce through concrete block's right flank, half recess of second level sets up in the bottom surface of building block, the penetrating concrete block's of building block length direction left surface is followed to half recess of second level, does not pierce through concrete block's right flank, the problem of the concrete prefabricated part design is solved. 本实用新型提供种混凝土砌块、混凝土砌块外模具及砌块组件、砌块组件外模具，其中所述混凝土砌块包括第水平半凹槽、第二水平半凹槽；第纵向半凹槽、第二纵向半凹槽；所述第水平半凹槽设置于砌块的顶面，所述第水平半凹槽穿透混凝土砌块沿砌块长度方向的左侧面，不穿透混凝土砌块的右侧面，所述第二水平半凹槽设置于砌块的底面，所述第二