The invention discloses a foil tape winding device, and relates to the technical field of processing of a reactor. The foil tape winding device comprises a rack, a motor and a speed reduction device, wherein the motor is fixed on the rack, the speed reduction device is connected with a main shaft of the motor, an output shaft of the speed reduction device is connected with a rotation shaft, a support block is fixedly arranged at one end of the rotation shaft, a foil tape cylinder sleeves the periphery of the support block, an inner cavity of the foil tape cylinder is adaptive to the shape of the support block, the inner cavity and the support block are both provided with rectangular cross sections, the foil tape cylinder rotates under the driving of the rotation shaft, and a foil tape coil is wound around the periphery of the foil tape cylinder. The foil tape winding device is simple in structure, stable in running process and low in vibration, and is convenient to operate, the axial compactness of the winding of the foil tape coil is high, continuous and automatic winding can be completed, the production efficiency is relatively high, and promotion and application of the toil tape winding device are promoted.