Fish tank with full-automatic regular feeding and water changing functions

The invention relates to the technical field of automatic feeding and water changing, and provides a fish tank with full-automatic regular feeding and water changing functions. The fish tank solves the problems that an automatic water adder of a sanitary appliance in a full-automatic regular water changing fish tank is prone to damage, a piston is easily blocked, the error rate is high, and no automatic feeder is provided. The fish tank with the full-automatic regular feeding and water changing functions comprises a fish tank body, an automatic feeder and an automatic water changing facility. The automatic water changing facility comprises a water discharge box, a small-flow start water discharge box, an intermediate-flow start water discharge box, a flow changing facility and a timing water valve. The automatic water changing facility and the automatic feeder are arranged on one side of the fish tank body side by side. The timing water valve is arranged between a water adding box and a water inlet pipe in a connecting mode. The fish tank with the full-automatic regular feeding and water changing functions is ingenious in design, low in manufacturing cost, small in size, reasonable in structure, convenient to use and practical. The health index and the survival rate of fishes are greatly improved, and the fish tank can be conveniently used and popularized. The fish tank mainly achieves the full-automatic regular feeding and water changing work for farmers, ornamental fish ponds, fountain fish ponds, fish ponds, fish tanks and aquariums and the like.