The utility model relates to the field of automobiles, in particular to a car roof with noise preventing function. The noise preventing car roof comprises a covering plate and a lining plate, wherein the lining plate is fixedly connected with the covering plate; the larger lining plate is fixedly connected with the weak part of the covering plate to strengthen the entire rigidity of the sedan roof, so the roof deformation caused by reasons, such as vibration, air damping and the like when car drives is reduced so as to prevent noise; the binder adhering surface between the lining plate and the covering plate is large, and the craft is simple. The density of synthetic rubber sheets is relatively small, and the vibration absorption is favorable, which can enhance the noise preventing effect of the car roof. In addition the synthetic rubber sheets are odorless and can be recovered.