The invention discloses aggregate used for a bituminous pavement epoxy ultra-thin watertight anti-skidding layer and a construction method of the watertight anti-skidding layer and belongs to the technology of highway construction. A new method for improving the firmness and durability of the bituminous pavement watertight anti-skidding layer is provided. According to the technical scheme, the aggregate is characterized in that the aggregate is composed of, by weight, 10-30% of fine aggregate and 70-90% of coarse aggregate, and the total amount is 100%; and the grain diameter of the fine aggregate is 0.5-2.0 mm, and the grain diameter of the coarse aggregate is 2.5-4.0 mm. The aggregate and the construction method are used for repairing treatment of a bituminous pavement.