The invention discloses a polystyrene maple-imitation product which is prepared by mixing and extruding color particles in different colors and wood grain agents. The color particles comprise, by weight, 20-40 parts of white particles, 30-60 parts of brown particles, 50-80 parts of yellow particles, 0.01-0.1 part of the coffee-color wood grain agent and 0.005-0.05 part of the purple wood grain agent; the color particles are prepared from, by weight, 70-80 parts of a polystyrene recycling material, 5-10 parts of modified polystyrene, 5-10 parts of foamed polystyrene, 1-5 parts of ABS, 1-10 parts of filler, 0.1-1 part of antioxidant, 0.1-1 part of plasticizer, 0.1-1 part of fire retardant and 1-10 parts of pigment; the wood grain agents are prepared from, by weight, 20-80 parts of modified polystyrene, 20-80 parts of ABS, 1-10 parts of polymeric carbon (PC) and 10-30 parts of pigment. According to the polystyrene maple-imitation product and a preparation method thereof, the waste packaging recycling material for polystyrene forming is utilized to be made into log-imitation products of different shapes, sizes and ratios, pollution, caused by waste materials, to the environment is reduced, and manpower for processing the waste materials is reduced.