A kind of aquarium self feeding device of what is closed in this creation system,System is equipped with a shell and engages with a feed vessel,The enclosure interior is equipped with a sliding slot,The shell is equipped with a feeding inlet and communicates with the sliding slot,The sliding slot inner wall of the shell is equipped with a guide groove； One cylinder base,System sets in the what shell,System is equipped with a room inside cylinder base； The outside wall surface of the cylinder base is equipped with a guide block,The guide groove limits when sliding up and down cylinder base in shell in conjunction with guide block； The side of the cylinder base sets a material inlet port,The cylinder base bottom sets a discharge port； The cylinder base bottom system is connected with a floating body,The what aquarium water surface is arranged in the floating body,Cylinder base is pushed to float up and down using the height of water,And discharge port and material inlet port is made to generate on-off action,And then reach outflow feed,Stop the function of discharging and automatic filling,Thereby can reach exempt from labor intensive,Electric power,And realize the characteristics of automatically controlling feeding and supplement feed.本創作係關於一種水族箱自動餵飼器，係設有一殼體與一飼料容器相接合，該殼體內部設有一滑槽，該殼體設有一入料口與該滑槽相通，該殼體之滑槽內壁面上設有一導槽；一 筒座，係設於該殼體內，筒座內部係設有一容室；該筒座之外壁面設有一導塊，該導槽與導塊結合使筒座在殼體內上下滑動時可以限位；該筒座之一側設一入料接口，該筒座底部設一出料口；該筒座底部係連設一浮體，該浮體設置於水族箱水面，利用水位落差推動筒座上下浮動，而使出料口及入料接口產生開閉動作，進而達到流出飼料、停止出料及自動充填的功能，藉此可達到免耗費人力、電力，而實現自動控制餵食及補充飼料的特點。
