The utility model relates to a film formula packing technology field, concretely relates to high -efficient trickle of cooling tower packs. The cooling tower trickle packs, opens wave form filler piece including the plural number, is formed with two at least bonding limits respectively along its length direction on every wave form filler piece, arbitrary two adjacent through corresponding between the wave form filler piece the bonding of bonding limit is connected, wave form filler piece forms the fluid passage that the interval set up on its corrugated surface, be provided with the intercommunication on the wave form filler piece fluid passage's water conservancy diversion passageway, the slope of wave form filler piece includes arcwall face and plane. The utility model discloses make the trickle form thin water film in filler piece both sides, the existing great surface area that packs constantly distributes when enabling the trickle whereabouts again, increases dwell time and the spray deposition uniformity of trickle on the filler piece to can realize the process of heat transfer, mass transfer well.