The invention relates to a filter residue recycling device for preparing adblue, the filter residue recycling device comprises a barrel, supporting legs, a liquid outlet pipe, a supporting plate, a liquid inlet pipe, an arc-shaped plate, a first rotating shaft, a porous cylinder, a hollow pipe, a filter screen, a driving mechanism and a discharging mechanism, the supporting legs are fixedly connected to the two sides outside the barrel, and the supporting plate is fixedly connected to the middle of one side outside the barrel; and the arc-shaped plate is fixedly connected to one side of the cylinder in a penetrating mode. The liquid inlet pipe is externally connected with the adblue, the liquid outlet pipe is externally connected with the collecting container, the adblue is discharged into the liquid inlet pipe and drives the discharging mechanism to move downwards, when the discharging mechanism moves downwards to the maximum stroke, the adblue is discharged into the porous cylinder, and the filter screen filters residues in the adblue, by twisting the first rotating shaft to rotate reversely, the filter screen can be replaced, and the filter screen can be moved out of the porous cylinder to be cleaned by an operator, so that the operator can conveniently clean the filtered slag, and the next use is not influenced.