An inkjet printing apparatus includes an inkjet print-head, an ink inlet conduit, a vacuum device, and a cleaning assembly. The inkjet print-head defines a number of nozzles. The ink inlet conduit is connected to the inkjet print-head and communicates with the nozzles. The cleaning assembly includes a cleaning member defining a cleaning groove. The vacuum device is connected to the inkjet print-head to impel cleaner received in the cleaning groove to flow through the nozzles along a direction reverse of a direction the ink is jetted.