This utility model relates to the field of curtain tracks and discloses a silent sliding curtain track mechanism, including a track body, two sealing covers, and a suspension mechanism. A support block is fixedly installed on the upper inner side of the track body, and protrusions are provided on both sides of the inner wall at the lower inner side of the track body. Sound-insulating cotton is provided on the inner wall at the lower inner side of the track body. The suspension mechanism includes a movable block, a hanging ring fixedly installed at the lower end of the movable block, and a fixed post fixedly installed on the upper inner side of the movable block. First rollers are rotatably mounted on both sides of the fixed post, second rollers are rotatably mounted on both sides of the outer end of the fixed post, and third rollers are rotatably mounted on both sides of the outer end of the fixed post. In this utility model, during movement, the first roller reduces friction and improves sliding smoothness, while the second roller can move between the two protrusions, effectively ensuring that the second roller does not deviate from the track.