A pipe-in-pipe water-gas mixed-culture cultural technique comprises a first pipe body and at least two second pipe bodies. The first pipe body comprises a connection pipe configured with a plurality of through holes, a hollow portion communicated with each through hole, a front terminal having a connection terminal port, and a rear terminal having a connection terminal port communicated with the connection terminal port of the front terminal. Each second pipe body, which is capable of being sleevingly engaged to the connection terminal ports of the front and rear terminals respectively, comprises a liquid transmission pipe and a gas transmission pipe disposed in the liquid transmission pipe. When the first pipe body sleevingly engaged to the second pipe bodies at the front and rear terminals thereof is disposed in a culture device having a centralized reverse pipe, excessive liquid can be effectively collected. Accordingly, purposes of reducing the waste of resources and achieving greening and environmental protection can be attained.一種管中管水氣混合培養栽培技術,其包含:第一管體,該第一管體設有連接管,又該第一管體其連接管設有數個透孔,該第一管體設有中空部,又該中空部可與每一透孔相貫通,該第一管體前後兩端設有連接端口,又該第一管體前後兩端其連接端口相貫通;至少二第二管體,該每一第二管體可分別與第一管體前後兩端其連接端口相套接,又該每一第二管體設有液體輸送管,該每一第二管體設有氣體輸送管,又該每一第二管體其氣體輸送管位設於每一第二管體其液體輸送管內;藉由該每一第一管體兩端套接第二管體且放置於每一栽培裝置時,即透過該每一栽培裝置設有集中迴流管,而可達到過多之液體回收之功效,俾以達到減少資源浪費、綠化環保之目的。10‧‧‧第一管體11‧‧‧連接管100‧‧‧連接端口12‧‧‧透孔13‧‧‧中空部20‧‧‧第二管體21‧‧‧液體輸送管22‧‧‧氣體輸送管
