The present invention is that a kind of semi-fermented tea withers processing method. Its step includes: step A by several apparatus for being loaded with tea cyanines, is respectively placed in several channels in a confined space； Step B is to distinguish array according to the humidity value height measured in channel to be aerated disappear water and sealed fermenting effect stage by stage； Step C is persistently to divulge information to the channel of valve opening, then connect and carry out humidification operation Hou, closing passage valve； The channel valve that original is closed simultaneously is opened, to be aerated, humidification； Step D be by each channel in turn and re-cover execute step B to step C, until tea cyanines stalk portion disappear water it is complete until. The deterioration device that the method uses is that internal confined space is divided into several channels, and the two sides in each channel are equipped with valve, and air-conditioning unit is arranged in each inlet air opening and extraction fan is arranged in each outlet air opening.本發明為一種半發酵茶萎凋加工法。其步驟包括：步驟A將數個載有茶菁的用具，各置入一密閉空間中的數個通道內；步驟B是依通道內測得的濕度值高低，區分數組來分階段進行通風消水與密閉發酵作用；步驟C是持續對閥門開啟的通道通風，再接續進行加濕作業後，關閉通道閥門；同時將原關閉的通道閥門開啟，以進行通風、加濕作用；步驟D是將各通道輪流且重覆執行步驟B至步驟C，直至茶菁梗部消水完全為止。該法使用的萎凋裝置，是將內部密閉空間隔成數通道，各通道的兩側設有閥門，又在各入風開口處設置空調單元、而各出風開口內設置抽風扇。
