Low-noise belt pulley

The utility model relates to the technical field of belt pulleys, and discloses a low-noise belt pulley which comprises a sleeve mechanism, a hole is formed in the middle of one side of the sleeve mechanism, blocking mechanisms are fixedly arranged on the two sides of the surface of the sleeve mechanism in a sleeved mode, the sleeve mechanism comprises a roller, and a plurality of silencing holes are evenly formed in the positions, close to the two ends, of the surface of the roller. Sound-absorbing cotton is fixedly connected to the middle inside the roller, sound-insulating cotton is fixedly connected to the surface of the sound-absorbing cotton, three fixing holes are evenly formed in the position, close to the middle, of one side of the roller in a penetrating mode, a heat dissipation layer is fixedly connected to the surface of the roller, and the three fixing holes comprise buffer layers. According to the utility model, the isolation buffer strips are arranged on the side wall of the belt pulley, the is