The invention discloses an assembled building locking structure with firm connection, and particularly relates to the technical field of assembled buildings. The assembled building locking structure comprises reference columns, wherein sliding grooves are formed in the reference columns at equal intervals, a mounting
assembly is arranged between the reference columns, and a locking
assembly is mounted in the mounting
assembly. According to the assembled building locking structure, through the arrangement of the mounting assembly, an inserting piece can be spliced with different positions of different reference columns, the structure is simple, the
energy consumption is low, the operation freedom degree is high, the positioning accuracy of space coordinate points is high, the splicing accuracy and efficiency are high, the workpiece damage rate is reduced, the safety is high, the
building construction cost is greatly saved, and the practicability is high; and through the arrangement of the locking assembly, the relative positions of two prefabricated parts can be fixed, when a building is disassembled, the inserting piece can be separated from the reference columns and put into use again, the connection is firm, the operation is simple, resources are saved, the assembly and disassembly are convenient, the recycling of building materials is facilitated, the waste of the building materials is avoided, and the environment protection is facilitated.