Sealed-type cylindrical roller bearing

The utility model belongs to the field of bearings, and mainly relates to a sealed-type cylindrical roller bearing, which comprises an outer ring, an inner ring, a cage, a rolling body, a check ring, a strainer ring, two sealing rings and two spring rings, wherein the check ring is arranged at one side of the inner ring, and an extension skeleton is arranged on the check ring; the extension skeleton and the second sealing ring are adhered into one whole, and the outer edge of the second sealing ring clings to the outer ring; concave platforms are arranged at the other sides of the outer ring and the inner ring, and the strainer ring is arranged between the concave platforms of the inner ring and the outer ring; the strainer ring is connected onto the concave platform of the inner ring through a bolt, and the first sealing ring is adhered to the contour edge of outer-diameter circumference of the strainer ring; the outer edge of the first sealing ring clings to the outer ring. The sealed-type cylindrical roller bearing provided by the utility model has the advantages that the structure is simple and the two end surfaces are effectively sealed; the strainer ring can block external impurities, but allows a lubricant to permeate into a slideway of the rolling body.