A locking apparatus for a pet cage is disclosed. The locking apparatus comprises a turntable rotatable about a central axis of rotation； at least one elongate metal lock bar, where elongate metal lock bar is configured to extend along a radial line originating from the axis of rotation of the turntable and a connecting member for operably connecting the elongate metal lock bar and the turntable. The connecting member comprises a forwardly extending portion for receiving a front section of the elongate metal lock bar and fixing a retained end of the elongate metal lock bar to the connecting member and a rearward extending portion which extends parallel with and is outwardly offset from the forwardly extending portion. The connecting member also includes a linear conversion mechanism arranged between the turntable and the rearward extending portion of the connecting member； the linear conversion mechanism configured to convert rotation of the turntable about the axis of rotation to linear movement of the connecting member in the same direction as a longitudinal direction of the elongate metal lock bar.
