The invention discloses a disc-pressing device of a CD player, which comprises a disc-pressing cover, a disc-pressing seat and a disk cover spring plate respectively matched with the disc-pressing cover and the disc-pressing seat. The disc-pressing seat is provided with an upper fixed part and a lower fixed part; the disk cover spring plate is provided with a limit platform, a downward bend matched with the upper fixed part and a limit bend, the disc-pressing cover is provided with a limit groove matched with the limit bend, a lug boss matched with the lower fixed part and a protrusion matched with the limit platform, and the disc-pressing cover is arranged between the disk cover spring plate and the lower fixed part. In the disc-pressing device of the CD player, the disc-pressing cover is simultaneously positioned by the coaction of the disk cover spring plate and the disc-pressing seat so that the disk cover spring plate can have a smaller size, be made of thinner plates and have easily controlled size precision, low plate cost and relatively simple and convenient assembly.