The invention belongs to the field of pouring molding of glass, and specifically discloses a processing method of a glass product. According to the processing method disclosed by the invention, before molten glass liquid is poured, cooling water is firstly pumped into a water-cooling through hole and wind is pumped into an air inlet, and the wind enters a second cavity and a first cavity; then the molten glass liquid is injected into a forming cavity, a draught fan is closed and ventilation is stopped when demolding is carried out; meanwhile, pumping of the cooling water is stopped, an air pump is started, the air in the first cavity and the second cavity is pumped out by the air pump, a fourth graphene plate and an upper mold are taken out, so that successful demolding can be carried out. According to the scheme, a method, which is easy in demolding and is capable of making the surface of formed glass smooth after demolding, of the glass product is provided.