The invention provides a follow-up type automatic compensation polished rod sealing device and belongs to the technical field of oil field machinery. The follow-up type automatic compensation polished rod sealing device comprises a sealing cover, a sealing shell, a pressure adjusting spring, a translation pressing plate, an upper follow-up platform, a follow-up packing box, a lower follow-up platform and a sealing foundation support; the follow-up packing box is in close contact with a polished rod, parallel movement in any direction in the horizontal plane is conducted by means of the upper follow-up platform and the lower follow-up platform, and the problem of eccentric wear is effectively solved; the follow-up packing box is provided with compensation packing and centralization packing, close contact with the polished rod can be achieved under continuous pressure, the sealing effect is improved, and packing wear can be compensated continuously; an annular cavity formed by a sealing cover retaining ring and the sealing shell is filled with lubricating oil and can provide continuous lubrication and oil seal for the upper follow-up platform, the lower follow-up platform, the polished rod and even the packing, radial and axial friction is reduced, meanwhile multiple purposes of saving energy, sealing, prolonging the service life and the like are achieved, and the follow-up type automatic compensation polished rod sealing device can be widely applied to wellhead sealers of oil field pumping units with rods.