The invention discloses an infant sleep aid device and a method for using the device. The device includes a bedplate and a player, an insulating layer is arranged under the bed plate, a support rod isarrange below that insulation layer, a roller is arranged below that support rod, an eccentric shaft is arranged at the center of the roller,, a support seat is arranged below that bearing, a supportbase is arranged below that support base, storage drawers is arranged at two ends of the support base, a bed girder board is arranged above the bed board, a horizontal frame is arranged at the top ofthe bed frame, a hanging slider is arranged on the horizontal frame, a player is arranged on the bed frame, a mosquito net is arranged on the outside of the bed frame, and a signal connector is arranged inside the player. The invention has the advantages that the device has the function of stable swing through the setting of the eccentric wheel, the eccentric shaft and the roller, the hands of the parents of the infant are freed, the hands of the parents of the infant are constantly swung in the infant sleep, the infant sleeps steadily, and the lullaby can be played for the infant when the infant sleeps through the setting of the player.