The present invention relates to an environmentally friendly floating device applied under the truss, comprising a floating body, which is mainly made of plastic and has a rectangular housing with a hollow chamber, the housing having a hollow chamber a communication opening, and a plug body is disposed at the opening； further, the surface of the casing has more than one ring groove, and a plurality of concave ribs are formed on both sides of the casing to enhance the load and strength of the floating body, and The plastic housing has the advantages of better strength, collision resistance, wear resistance and deformation resistance, so that the floating device of the present invention has the environmental benefits of repeated use and extended service life.本創作係有關於一種運用於蚵架下方之環保浮具，包含一浮具本體，該浮具本體主要係由塑膠製成具有中空容室之矩形殼體，該殼體具有一與中空容室連通之開口，且於該開口處設有一塞體；又，殼體表面具有一道以上之環槽，並於殼體兩側開設有複數道凹肋，以增強浮體之載重性及強度，且藉由塑膠殼體之強度較佳、耐碰撞、耐磨損不易變形之特性，使本創作之浮具具有重複使用及延長使用期限之環保效益。
