The invention relates to an improved device for separating organic sediment and water in deposited oil residues from inorganic sediment in the deposited oil residues. A plurality of through holes are formed in each screw conveying extrusion filter blade of a deposited oil residue primary separation mechanism of the device, and a deposited oil residue re-separation mechanism of the device is provided with a plurality of baffling extrusion buckets. By means of the device, most of liquid extruded out of the deposited oil residues longitudinally penetrates the multiple through holes formed in the screw conveying extrusion filter blades to flow in the concentrated liquid outlet direction, and drainage of the extruded liquid is facilitated greatly; and the wet residues are repeatedly baffled in the multiple baffling extrusion buckets, the moving direction period is changed, the liquid is strongly extruded repeatedly, the contained liquid is further extruded, dry residues small in liquid content are finally obtained, and finally the organic sediment and water in the deposited oil residues are separated from the inorganic sediment in the deposited oil residues.