The invention discloses a household appliance decoration plate and a preparation method thereof and belongs to the technical filed of household appliances and furniture decoration preparation. The household appliance decoration plate is formed by bonding four material layers, wherein the first layer is an oil-immersed elm layer, the second layer is a flexible transition layer, the third layer is a decoration base layer and the fourth layer is a decoration layer. According to the household appliance decoration plate, the base plate adopts the oil-immersed elm; as elm material is relatively heavy, but firm and durable; the effects of being light in weight, high in hardness and unlikely to crack are realized after repeated oil immersion and drying in the sun; the decorative pattern is formed by adopting a concave carving and dye filling combined method, the problem of color fading as the pattern gets worn does not occur; the plate surface of each layer is bonded with each other through a strong glue, so that the stability of the plate is improved and the plate is durable.