The invention discloses a method for removing fluorine of lepidolite through circulating fluidized bed roasting. The method comprises the following specific steps: putting the levigated mineral powderinto a circulating fluidized bed, enabling the mineral powder to rise with the combustion heat gas and the introduced water vapor, and roasting to remove fluorine; leading mineral powder, the combustion heat gas and the water vapor together into a cyclone separator horizontally connected with the top of the fluidized bed, and performing gas-solid separation; feeding the mineral powder into a circulating discharge chute, and blowing some of the mineral powder, by air or vapor, into the fluidized bed so as to remove fluorine by circular roasting; discharging the rest mineral powder into a cooler, and cooling to obtain a finished product of fluorine-free lepidolite; cooling the tail gas of cyclone separation by a waste-heat vapor recycling system, and recycling the heat before feeding the tail gas into a dust removal system; finally, removing fluorine of the tail gas and discharging into the atmosphere. According to the method disclosed by the invention, the lepidolite mineral powder contacts and reacts with high-temperature water vapor in a liquid state, the temperature control is uniform, and the fluorine removal is stable and thorough; the process is simple, the heat in the wholeprocess is recycled in the forms of vapor and preheated air, and the heat recycling rate is high.