The invention relates to a climbing film plate type evaporator. A detachable climbing film plate type evaporator is mainly characterized by comprising an upper beam; a lower beam is connected with a fixed compaction plate and a tail frame; a movable compaction plate is provided with a hanger and is hung on the upper beam; multiple heat transfer sheets are arranged between the fixed compaction plate and the movable compaction plate; a sealing rubber mat is arranged between every two heat transfer sheets; the fixed compaction plate and the movable compaction plate are fixedly connected through a clamping bolt; and the heat transfer sheets consist of heat transfer sheets A and heat transfer sheets B. The detachable climbing film plate type evaporator provided by the invention has the advantages that: 1, the handling capacity is great, the evaporation efficiency is high, the condensation is fast, the vapor-phase flow resistance is low, and the pure reverse flow is adopted in the flowing direction of the cold and hot fluid; 2, the structure principle of climbing film evaporation is realized by adopting the plate type structure design of combination A and B; 3, the high-rigidity design of the plate type is realized by adopting multiple support structures; 4, by adopting mesh guide flow, the dead zone of heat transfer is reduced, and the heat transfer efficiency is improved; 5, the heat transfer efficiency is improved through the hot-mixing heat transfer design; 6, with the unique five-point positioning technology, the reliability of large-area assembly is realized; and 7, the formation of various special materials is realized by coarse-pitch design.