Elastic sealing fin device of rotary air pre-heater

The invention relates to the field of rotary air pre-heaters, in particular to a sealing part of a rotary air pre-heater. An elastic sealing fin device of the rotary air pre-heater comprises a sealing strip, an elastic component and a supporting sheet, wherein the sealing strip and the supporting sheet are fixedly fixed with the two ends of the elastic component respectively; the elastic component comprises a plurality of groups of fixedly connected elastic units; and each group of elastic units consists of two metal sheets which are connected into the shape of inverse V. The sealing strip and the supporting sheet are connected through the elastic component, so the sealing strip is always kept in direct contact with a sealing plate without a clearance in a movement process; the metal sheets which are connected into the shape of inverse V can twist to drive the sealing strip to move in three directions, so the sealing strip and the sealing plate can be mutually contacted when the rotary air pre-heater is under