Expandable polystyrene particles with high foaming ratio and preparation method thereof

The invention relates to expandable polystyrene particles with high foaming ratio and a preparation method thereof, and particularly relates to raw materials for producing cushion packaging materials for electronics, building insulation materials and ocean floating products and a preparation method thereof. The expandable polystyrene particles with high foaming ratio are characterized by being prepared from styrene, soft water, nucleating agent, calcium phosphate, benzoyl peroxide, tert-butyl perbenzoate, white oil, a molecular chain acting force regulating agent, pentane, a surface lubricant and the like as raw materials by the steps of mixing, reacting, filtering and drying. The foam plastic prepared from the expandable polystyrene particles has low production cost; and used as a packaging material, the foam plastic is hard to break and can prevent the packed material from being damaged.