Fabricated building connecting joint

The utility model belongs to the technical field of building construction, and particularly relates to an assembly type building connecting joint which comprises a supporting column, an installation pipe installed on the surface of the supporting column, a connecting piece connected to the surface of the installation pipe in an embedded mode, a fixing groove formed in the top surface of the connecting piece, a moving block connected to the surface of the connecting piece in a sliding mode and a rotating shaft connected to the surface of the moving block in a longitudinal penetrating mode. According to the utility model, the connecting piece is conveniently embedded and connected through the mounting pipe connected with the surface of the supporting column, and the mounting pipe is conveniently butted by utilizing the mounting hole reserved in advance on the surface of the accessory, so that the connection relationship among the accessory, the component and the supporting column is embedded, connected and stab