The invention discloses a floating frame device for a medium-high voltage electronic aluminum production line and a using method thereof. The floating frame device comprises a supporting frame, guide shafts, floating frames and a roller beam. The supporting frame is provided with the guide shafts, the roller beam is arranged at the tops of the guide shafts, transition rollers are uniformly distributed at the upper part of the roller beam, the two ends of each transition roller are respectively connected with the roller beam, the lower part of the roller beam is provided with small rollers A which are one less than the transition rollers, and the two ends of each small roller A are respectively connected with the roller beam. The floating frames are arranged in the middles of the guide shafts and are in sliding connection with the guide shafts through sliding blocks. The small rollers A are additionally arranged on the roller beam, large rollers and small rollers B are arranged on the floating frames to form a combination similar to a pulley block form, so that foil winding floating of the multiple sets of rollers is achieved. The foil winding mode of the large rollers, the small rollers A, the small rollers B, the transition rollers and the next set is adopted, the winding length of electronic aluminum foil is increased, the buffering time is prolonged, the foil winding structure is more compact, the occupied space of the foil winding structure is small, and meanwhile the stability of equipment is improved.