Fabricated building connecting structure

The utility model discloses an assembly type building connecting structure which comprises a stand column, a structural beam and a fixing column, the fixing column is arranged on the top face of the stand column, a connecting short beam is transversely welded to the outer surface of the fixing column, a steel cylinder is welded to the top face of the connecting short beam, a clamping block is connected to the surface of the steel cylinder in a penetrating and sliding mode, and one end of the clamping block is an inclined face. The utility model has the beneficial effects that the steel cylinders and the slots are adopted, and the slots are arranged on the bottom surfaces of the two ends of the structural beam corresponding to the positions of the steel cylinders, so that when the structural beam is mounted, the slots at the two ends of the structural beam can be aligned with the steel cylinders, then the structural beam is moved downwards, the steel cylinders are inserted into the slots, and the inner walls o