The utility model relates to a multi-external-field-coupled two-dimensional photocatalytic fluidized bed device. A loudspeaker is mounted at the top of a fluidized bed main body and is connected with a signal generator through a signal amplifier, lampshades are arranged on the front and rear end faces of the fluidized bed main body, electromagnetic coils are arranged on the left and right end faces of the fluidized bed main body, ultraviolet lamps are arranged in the lampshades, a waste gas inlet is located at the lower end of the fluidized bed main body, a purified gas outlet is located at the upper end of the fluidized bed main body, a gas distribution plate is arranged in the internal cavity of the fluidized bed main body, and a catalyst particle baffle is arranged above the gas distribution plate. The multi-external-field-coupled two-dimensional photocatalytic fluidized bed device has the beneficial effects that the structure is novel and reliable, the operation and use are convenient and flexible, and thus, the device is applicable to the photocatalytic degrading treatment and the like of organic waste gases in enclosed and semi-enclosed human living spaces, factory production workshops and pump rooms and has a good practical application effect; and organic pollutants can be completely mineralized into CO2, H2O and inorganic ions, so that air is thoroughly purified, and the injury/damage to human beings or environments caused by volatile organic waste gases is avoided.