A kind of cultivation water filtering device, includes at least one filter element, which includes a filtering base, a water-permeable pipe, a filter material and an overflow pipe. The water-permeable pipe is mounted in the filtering base, uses the optimization space region and a filter space area for separating out internal and external partition, which has several perforation. The filter material is arranged in the filter space area. In overflow pipe installation what optimization space region and it is connected on the downside of the filtering base, and with position what top and for the overflow port of the cultivation water overflow entrance in the optimization space region, and the opposite what overflow port and for the cultivation water discharge discharge outlet, the top of the low what water-permeable pipe of the overflow open height. The cultivation water filtering device said structure design, can effectively filter the cultivation water really, use Optimal culture ecology.一種養殖水過濾裝置，包含至少一個過濾單元，該至少一個過濾單元包括一個過濾座、一個透水管、一個過濾材，及一個溢流管。該透水管安裝在該過濾座內，藉以區隔出內外間隔的一個優化空間區與一個過濾空間區，該透水管具有數個穿孔。該過濾材設置在該過濾空間區內。該溢流管安裝於該優化空間區內且連通至該過濾座下側，並具有一個位於頂端且供該優化空間區內的該養殖水溢流進入的溢流口，及一個相反於該溢流口且供該養殖水排出的排水口，該溢流口高度低於該透水管的頂端。該養殖水過濾裝置上述結構設計，確實能有效過濾該養殖水，藉以優化養殖生態。
