This invention relates to an adjustable electric knife smoke sucking device for medical surgery, which comprises a handle, an adjustable smoke sucking tube, an electric knife, This invention is characterized in that the adjustable smoke sucking tube is an integrally formed one-way tube, comprising a front tube section and an adjustable tube section, and the opening of the front tube section is near to the front end of the electric knife when the front tube section is subject to tension or compression, the adjustable tube section is coupled to be stretched by tension or shortened by compression, so as to change the distance between the opening and the position of the electric knife front end and the opening diameter is smaller the integrally connected tube diameter, and the adjustable tube section is extended backward to over one centimeter from the rear end of the handle.一種醫用手術可調電刀吸煙裝置,其包含;一手柄,一可調吸煙管,及一電刀具;其特徵在於:該可調吸煙管為一體成形之一通管,包含一前管段、一可調管段,該前管段開口接近該電刀具前端;該前管段受拉伸或壓縮,連動該可調管段管壁受拉伸長或受壓縮短,改變該開口距離接近該電刀具前端位置;及該前管段開口口徑小於其一體連接之管徑,該可調管段則向後延伸出該手柄後端口一公分以上。10...醫用手術可調電刀吸煙裝置20...手柄21...中空通道22...前端口23...後端口30...可調吸煙管31...前管段311...開口32...可調管段40...電刀具41...控制線路