The invention discloses a press-in mechanism for dual oil seals. The press-in mechanism for dual oil seals is used for pressing a first oil seal 1a and a second oil seal 1b into a workpiece 2 in sequence, a protrusion 2b is arranged on the workpiece 2. An installation hole 2a for installing the oil seals 1 is formed in the center of the protrusion 2b. A notch 2c communicating with the installationhole 2a is formed in the center of the protrusion 2b. The press-in mechanism for dual oil seals comprises a guide sleeve 3 and an extrusion part 4 movably connected with the guide sleeve 3. The extrusion part 4 comprises a guide column 6 and an extrusion portion 6b which is connected with one end of the guide column 6 and used for extruding the oil seals. The diameter of the extrusion portion 6bis smaller than the outer diameters of the oil seals. A convex block 8 matched with the notch 2c is arranged on the extrusion portion 6b. Because the convex block capable of being inlaid into the notch of the workpiece is arranged, it can be guaranteed that both the first oil seal and the second oil seal can be installed in position, and overpressure will not happen.