The invention provides an alga / fish
mixed type three-dimensional ecological fish shelter and a feeding method of the fish shelter, wherein the fish shelter comprises an anchoring
system, a fish shelter top consisting of a floating ball and a
fixed frame, a fish shelter middle layer consisting of a horizontal grid and a
fixed frame suspended with a middle spherical fish shelter, and a fish shelterbottom consisting of a horizontal grid and a
fixed frame suspended with a bottom spherical fish shelter; and the fish shelter middle layer is respectively connected with the fish shelter top and the fish shelter bottom by a connecting
rope and the lengthways crossed grid. The feeding method comprises the following steps of: shipping to a feeding sea area, firstly throwing a first anchor along with the direction of incident flow, sequentially throwing a second anchor by means of fair current, tying an anchor
tail rope and a mark float at the back end of the anchor, dragging the anchor
tail rope by means of fair current, tensioning a whole
system, and completing feeding. According to the invention, the fish shelter can be used for culturing and proliferating the alga with different water depths, is taken as a perching and refuge occasion of the small size medium-upper layer fish and a
large size medium-upper layer
juvenile fish, and is simple in structure, and convenient to assemble andrecover, so that the novel artificial fish shelter can be provided for building an ecological marine ranch.