The utility model discloses a face-thinning device which is characterized by comprising two face-shaped massage plasters, wherein the middle of each massage plaster is provided with a vibration device, and the signal input end of the vibration device is connected with the signal output end of a control device. According to the utility model, the two massage plasters are attached and applied to two cheeks, the control device drives the vibration devices to massage the cheeks, skin whitening emulsion can be coated on the massage plasters, and can be effectively absorbed through massage of the cheeks, thus the face is thinned and a cosmetology effect is achieved.