The invention relates to a composite board for cabinet veneering and a manufacturing method of the composite board. The composite board has a four-layer 
board structure, wherein the first layer consists of PMMA, UV, a 
silicon oxide scratch resistant agent, and a 
stearic acid surfactant, the second layer and the fourth layer consist of ABS, UV and 
titanium dioxide color 
masterbatch, and the third layer consists of PMMA, ABS, UV and 
titanium dioxide color 
masterbatch. The manufacturing method of the composite board comprises the following steps: evenly mixing and stirring raw materials of all the 
layers in respective mixing hoppers, after 
drying, plasticizing, melting and extruding the raw materials into corresponding runners of distributors at a certain temperature by three 
extrusion machines, extruding the raw materials out by T-shaped die heads, 
calendering by a 
calendering system, drawing, carrying out 
corona, and carrying out longitudinal and transverse size shearing to obtain the composite board. According to the four-layer structure of the composite board provided by the invention, the board cannot produce 
delamination or crack easily, meanwhile, the board has the advantages of being not easy to fade, scratch resistant and the like, and can be widely applicable to high-end furniture veneering and other indoor and outdoor decoration.