The utility model discloses a mixed recovery unit of unqualified zrO2 vacuum suction, including screw conveyer, material storehouse, filtration storehouse, vacuum pump, the vacuum pump through connecting pipe and vacuum diverter valve with filter the storehouse and be connected, be provided with the high accuracy filter core in filtering the storehouse, the high accuracy filter core is connected with the back flushing gasbag who sets up above filtering the storehouse, the below of filtering the storehouse is provided with the material storehouse, filters and is provided with the unloading butterfly valve between storehouse and the material storehouse, the one side in filtration storehouse has been seted up and has been inhaled the material mouth, inhales the material mouth and expects through inhaling that hose and material communicate, the top in material storehouse is provided with the high material level meter, and the below in material storehouse is provided with low charge level indicator, the material storehouse is connected with screw conveyer through the flange of below opening part. The utility model discloses do not need the manual work to put in material, greatly reduced workman's intensity of labour, in addition, unqualified zrO2's transmission capacity passes through the screw conveyer adjustment, and its proportion is controllable to the problem that does not have the dust to reveal can not cause environmental pollution.