Roller bearing and low-noise high-strength retainer thereof

The utility model relates to the field of bearings, in particular to a roller bearing and a low-noise high-strength retainer thereof. A low-noise and high-strength retainer comprises two circular-ring-shaped check rings and a plurality of sets of supporting column combinations evenly arranged between the two check rings in the circumferential direction, and a pocket used for containing a roller is formed between every two adjacent supporting column combinations. The support column combination comprises a core column located in the middle and an injection molding material layer wrapping the outer side of the core column; the two ends of the core column extend out of the outer side of the injection molding material layer and are fixedly connected with the check rings on the two sides of the core column respectively, and the injection molding material layer forms the side wall of the pocket. A supporting column combination in the retainer comprises a core column located in the middle and an injection molding mat