The invention discloses a buffering packaging box used for packaging a pair of tennis rackets and multiple tennis balls. The buffering packaging box comprises an outer box body formed by folding a piece of corrugated paper, the outer box body comprises a bottom plate, side plates vertically connected to two opposite side edges of the bottom plate and an upper cover plate vertically connected to the side plate on one side and used for sealing the outer box body, a supporting body I and a supporting body II used for fixing a pair of tennis rackets are arranged on the other two opposite side edges of the bottom plate, a first through hole used for fixing a handle of one tennis racket is formed in the supporting body I, and a groove used for fixing the top of the other tennis racket is formed in the supporting body II; and fixing bodies used for fixing the tennis balls are symmetrically arranged on the other two opposite side edges of each of the two side plates. By using the buffering packaging box, the tennis rackets and the tennis balls can be integrally sold, and the consumption and waste of the packaging material and the design cost of secondary design of product packaging generated when the tennis rackets and the tennis balls are independently sold can be avoided.