The utility model relates to a multi-level filtering device on the upper part of an aquarium.It includes several filter boxes.It is composed of several connecting plates.The filter box is formed by a box with five sides sealed and one side opened.The connecting plates can be placed at the four corners and four sides of the opening edge of the filter boxes.The filter boxes have different sizes and can be inserted into each other in sequence.The plate body pivoted on the front of the joint plate can undertake the structure of the smaller size filter box.In case of use,The filter boxes of different sizes can be stacked to be used as the upper multi-level filter device of the aquarium.And there will be no inconvenience caused by occupying space when transporting and warehousing.Effectively reduce the cost of storage and transportation.And make full use of the changes in space.It has the advantage of saving cost by combining storage and transportation space.It can provide convenience for use.Flexible transportation and storagePractical function of adaptability.一種水族上部多層次過濾裝置，包括有若干過濾箱，與若干接合板所組成，該等過濾箱以一般五面封壁一面開通之箱體成型，該等接合板係可鋪置於該等過濾箱開通緣面之四角與四邊位置，並藉由該等若干之過濾箱具有大小尺寸不同而可順序相互插入套合的設計，搭配該等接合板前方所樞設之板體恰可承接較小尺寸過濾箱的結構，俾於使用時，可將大小尺寸不同的該等若干過濾箱層層疊高以作為水族上部多層次過濾裝置使用，而運送倉儲時又不會有佔用空間造成不便之困擾，有效降低儲存與運送之成本，並充分靈活運用空間的變化，而形成具套合儲存與運送空間節省成本之優勢，能確實的達到提供使用時之方便，與運送與儲存時靈活、適性之實用功能。
