The invention provides a colorful shaving board, a manufactured wooden product and a one-step molding technology thereof. The colorful shaving board comprises a core layer and a surface layer, the core layer is made of raw materials comprising irregular shavings, and the surface layer is made of raw materials comprising dyed regular shavings. The one-step molding technology comprises the followingsteps that shaving raw materials are selected and machined into regular shavings and irregular shavings; the regular shavings are dyed; a board blank is paved by taking the dyed regular shavings as the surface layer and taking the irregular shavings as the core layer; and the board blank is molded through pressing. The produced shaving board is natural and environmentally friendly, and then the original ecological home pursuing requirements of consumers are met. Meanwhile, the surface layer with the regular shavings can show people the colorful patch archaic feeling or mosaic scattered accumulation feeling and is low in repetition rate and high in personalization degree, the market competitiveness is enhanced, and the direct applicability of the home shaving board is achieved.