Efficient energy-saving oxygen supply type sewage treatment tank

The invention discloses an efficient energy-saving oxygen supply type sewage treatment tank which comprises a tank body, a fixed column is fixedly connected to the bottom in the tank body, a strip-shaped cavity is formed in the inner wall of the fixed column, a reciprocating lead screw is rotatably connected to the top in the strip-shaped cavity, the upper end of the reciprocating lead screw penetrates through the upper end of the fixed column and is fixedly connected with a plurality of air cups, the side wall of the reciprocating lead screw is in threaded connection with a magnetic sliding plug, the lower end of the magnetic sliding plug is fixedly connected with a sliding plate through a fixing rod, and the sliding plate is in sealed sliding connection with the inner wall of the strip-shaped cavity. Induced current is generated on the spiral coil, then a loop is formed between the positive electrode electrolytic rod and the negative electrode electrolytic rod to electrolyze water, oxygen is generated at th