The utility model discloses an adjustable supporting device for wall tiles for decoration, which comprises a support and a tile limiting mechanism supported on the support, the tile limiting mechanismcomprises two vertical baffles and two vertical clamping plates, and the two vertical baffles and the two vertical clamping plates enclose a square wall tile placing area. The bottoms of the verticalbaffles are connected with the support in an overturning mode through rotating rods, the vertical clamping plates are connected to the support through clamping plate pushing mechanisms, and the distance between the two vertical clamping plates is adjustable under the action of the clamping plate pushing mechanisms. According to the utility model, the wall tiles can be prevented from moving or falling off to be broken in the carrying process; and the height of the supporting plate can be adjusted, so that the horizontal supporting plate is located at the proper height, workers can place and take the wall tiles conveniently, and the wall tiles can be cleaned.