The utility model relates to a glass reinforced plastic bubble tube for wet flue gas desulfurization, which comprises a tube body. The bottom of the tube body is provided with a bubble hole. The top of the tube body is provided with an installing cap. The installing cap takes a shape of cone. A big end of the cone installing cap is upward and is in parallel and level with a tube orifice. The inclination of the cone installing cap is between 10 degrees and 60 degrees. When the glass reinforced plastic bubble tube is arranged, the tube body of a bubble tube passes through an installing cone hole on a separator, the installing cap and the cone hole of the separator are in close fit with each other, a lower separator and the bubble tube are coated by glass reinforced plastic materials to be connected into one body so as to completely solve the problem that the bubble tube drops off. The utility model has firm installation fit and safe and reliable production, and improves the efficiency of flue gas desulfurization.