Modular self locking construction brick

The utility model belongs to a building material, in particular to a cordwood self-locking building brick for buildings, which comprises a brick body (16), wherein a plurality of top surface bosses (1) are evenly distributed on an upper surface of the brick body (16), a top surface transverse rib (5) and a top surface longitudinal rib (11) are arranged between the top surface bosses (1), and the center of the top surface boss (1) is equipped with via holes (4). The front surface of the brick body (16) is equipped with a plurality of front dovetail bosses (2) and a plurality of front dovetail grooves (3), a left end surface is equipped with a left dovetail groove (8) and a left dovetail boss (13), the right end is equipped with a right dovetail groove (12) and a right dovetail boss (6), a plurality of bottom grooves (7) are evenly distributed on a bottom surface, and a bottom transverse groove (14) and a bottom longitudinal groove (15) are arranged between the bottom grooves (7). A partition wall which is buil