This creation provides a kind of plant cultivation device,It include that can accommodate one of nutrient solution dish for cultivating,Comprising it is one of of different size first,One second tank and set what first,Two support divisions between second tank； One field planting plate,Set in what dish for cultivating and can in the variation with nutrient solution water level,Lower displacement,Its extreme lower position system is down on the support division,Can be used as the reference frame for whether supplementing nutrient solution； One drainage control system,Including protruding out in the what dish for cultivating and the plural number water level pipe of height difference,Wherein a water level pipe maintains a normally open state,It can be automatically drained out the nutrient solution water level in dish for cultivating more than its height,A control valve is respectively equipped on remaining water level pipe,The nutrient solution of discharge different height can be controlled whether respectively,In addition,The height for increasing by second tank more can be used as plant nutrient solution storage disk,Yield can be improved.本創作提供一種植物培養裝置，包含有可容納養液之一栽培盤，包含寬度不同之一第一、一第二容槽與設於第一、第二容槽間之二抵持部；一定植板，置於栽培盤內而可隨養液水位之變化上、下移位，其最低位置係降至該抵持部上，可作為是否補充養液之參考依據；一排水控制系統，包括凸伸於該栽培盤內且高度不同之複數水位管，其中一水位管保持常開狀態，可自動排出栽培盤內超過其高度之養液水位，其餘水位管上分別設有一控制閥，可分別控制是否排出不同高度之養液，此外，增加該第二容槽之高度更可作為植物養液儲存盤，可提高產量。
