The present invention relates to a crib, and discloses a rocking mechanism and a crib with a rocking mechanism, which includes a fixed seat (2) for mounting support legs (1) and a movable seat (3) for mounting a cradle, and a connection mechanism (4) is provided between the fixed seat (2) and the movable seat (3), and the connection mechanism (4) includes at least two connection rods (401) set side by side, and the movable seat (3) and the fixed seat (2) are provided with the connection holes (301) to house both ends of the connecting rod (401), and the connection holes (301) are provided with bearings (402) installed on the connecting rod (401). The invention allows a gentler way to rock multiple cribs, which lowers the risk of hurting infants, and promises simple structure, low cost and ease of use.