The utility model discloses a granulating device for hard asphalt. The granulating device is that a hard asphalt melting cylinder is communicated with a molten hard asphalt inlet of a material distributor by a stock pump; the material distributor mainly comprises an outer component and an inner component, wherein the inner component is connected with an asphalt conveying pipe; at least one inner material distributing groove or a row of inner material distributing holes is/are formed at the lower bottom part of the internal component; the outer component is sleeved on the outer surface of the inner component; a plurality of external material distributing holes are at least uniformly formed at the circumference of the outer component; a rotary steel belt is arranged on the lower surface of the material distributor; a cooling water spraying system and a cooling water collecting groove are placed on the lower surface of the rotary steel belt at the upper part; the cooling water spraying system is communicated with a cooling water groove through a cooling water pump; and the cooling water collecting groove is communicated with the cooling water groove through a pipeline. The asphalt prepared by the granulating device is uniform in dimension and nice in appearance; and the asphalt particles are not directly contacted with a cooling medium, so that the smoke dust and the water pollution generated in the production process can be obviously reduced.