The invention belongs to the technical field of logistics trays, and provides a rare earth ferrosilicon alloy ash-based composite material which is prepared from 30 to 40 parts of rare earth ferrosilicon alloy ash, 47 to 57 parts of polyvinyl chloride, 2 to 3 parts of stabilizer, 2 to 4 parts of modifier, 1.5 to 2.5 parts of foaming agent, 4 to 8 parts of foaming regulator, and 0.2 to 0.6 part oflubricating agent. The invention further provides a logistics tray obtained through the rare earth ferrosilicon alloy ash-based composite material. The tray has the characteristics of reasonable structure design, simple structure, light weight, high bearing capacity, good waterproofness and corrosion resistance, reusability and the like. It is shown, by the embodiment result, that the density of the logistics tray provided by the invention is 0.61 to 0.7 g/cm<3>, and the static bending intensity is 32 to 40 MPa. The invention further provides a preparation method of the logistics tray. The preparation method is energy-saving, clean, simple and convenient.