Vacuum filter

The utility model discloses a vacuum filter, and belongs to the technical field of vacuum filtration. The vacuum filter comprises a filter shell, the filter shell is provided with a feeding port, an impurity outlet, an extraction opening and an air inlet, the feeding port is formed in the upper portion of the filter shell, the impurity outlet is formed in the lower portion of the filter shell, and the extraction opening is connected with a filtrate tank; the filter drum is arranged in the filter shell and can rotate relatively, one end of the filter drum is connected with the extraction opening, and raw materials entering the filter drum from the feed port enter the filter drum from the outside of the filter drum and flow into the filtrate tank through the extraction opening to be stored; the cleaning assembly comprises a cleaning spray head arranged above the filtering roller, and liquid sprayed out of the cleaning spray head can flow to the filtering roller; and the filter cake recovery tank is arranged bel