The invention discloses a cleaning device and a kitchen ventilator with the same. The cleaning device comprises a cleaning agent source, a cleaning agent spray pipe and a sliding block, wherein the cleaning agent spray pipe is provided with a cleaning agent inlet and a plurality of cleaning agent spray holes, the cleaning agent inlet of the cleaning agent spray pipe communicates with a cleaning agent outlet of the cleaning agent source, and the multiple cleaning agent spray holes are formed in the length direction of the cleaning agent spray pipe at intervals; and the sliding block is movablyarranged in the cleaning agent spray pipe in the length direction of the cleaning agent spray pipe, and used for sealing and covering part of the multiple cleaning agent spray holes. The cleaning device of the embodiment of the invention has the advantages of being good in cleaning effect, thorough and comprehensive in cleaning, simple in structure, low in assembly difficulty, low in manufacturingcost and the like.