Pressure-resistant sealing bearing

The utility model belongs to the technical field of bearings, and particularly relates to a pressure-resistant sealed bearing which comprises an outer ring, an inner ring arranged in the outer ring, sealing pieces arranged at two ends between the outer ring and the inner ring, and a first retainer and a second retainer arranged between the outer ring and the inner ring, a plurality of rolling elements are evenly installed in the first retainer and the second retainer, a plurality of inserting holes are formed in the first retainer, an inserting rod is fixed to the face, attached to the first retainer, of the second retainer, a pin rod is installed in the inserting rod, and a first positioning head is fixed to the outer wall of the front end of the pin rod. A first positioning head is arranged on one side of the pin rod, a second positioning head is arranged on one side of the first positioning head, a knob nut is installed at the rear end of the pin rod, and a clamping cover is installed at the front end of t