Suoguatong (bearing timber components) in Minnan traditional old-age houses could be used to decorate the joints of the house components and enhance the art aesthetic effect to the indoor environment. Its molding decoration style is simple, exaggerative and elegant. There are three structures of bats filled, symmetrical and unsymmetrical ones. The color of Suoguatong in common houses is simple and unadorned with the original color of wood, while in most of family temples and ancestral halls the Suoguatong is colorful. The molding decorative subjects include 6 categories as figures, auspicious beasts, plants (flowers & fruits) and utensils, wishful patterns, Chinese knots and swirl grains. The decoration of Suoguatong in Minnan old houses has been permeated with luxuriant cultural sedimentation and delivered subtle feelings between buildings and man. The study and excavation of the essence of the excellent traditional culture could promote the inheritance and development of the culture.