A double-trough type plant cultivation device capable of automatically adjusting tidal level is provided, which at least comprises two cultivation troughs, a cover plate and two sets of pumping device. A quantitative cultivation liquid is substantially filled in each cultivation trough, and the cover plate is covered on the two cultivation troughs. The cover plate is provided with a plurality of openings utilized for containing the cultivation container, and the two sets of pumping device are respectively arranged between the two cultivation troughs. Each pumping device comprises a fixing plate, a submerged motor and an aqueduct. The two sets of pumping device are respectively utilized to draw water in a staggered way to staggeredly pump the cultivation liquid to the corresponding cultivation troughs, so that the cultivation liquid between the two cultivation troughs can exchange mutually to create change of tidal water level and achieve objectives of ventilation of dissolved oxygen and uniform mixing of the cultivation liquid. Further, the said double-trough type plant cultivation device can be additionally installed with a detector to detect the concentration, temperature and water level of the cultivation liquid, thereby controlling the growth of the cultivated plants. In addition, according to the water level detected information and harvest expected date, tidal level and cultivation liquid supply level can be automatically reduced gradually, so the cultivation liquid in the cultivation trough can be controlled to be just sucked up in time of plant harvest without leaving a drop of cultivation liquid in order to achieve the cultivation purposes of no liquid discharge, no recovery, and the most environmental protection and economy.一種可自動調節潮汐水位的雙槽式植物栽培裝置,至少包括:兩個栽培槽、一蓋板及兩組抽水裝置,主要是於各栽培槽內注入定量的栽培液,將蓋板蓋合於兩栽培槽,蓋板係設有多數個可供容納栽培容器的開孔,而兩組抽水裝置係分別設於兩栽培槽之間,所述抽水裝置係包含一固定板、一沉水馬達及一引水管,且兩組抽水裝置係採交錯引水方式,將栽培液相互交錯的抽引至彼此相對的栽培槽,使兩個栽培槽之間的栽培液可相互交換而產生潮汐水位的變化,並達到溶氧換氣及栽培液均勻混合等目的;更進一步,上述的雙槽式植物栽培
