The invention discloses a ring-shaped oxygen supply device for aquaculture ponds. The structure includes a base, a motor, a blower, an air intake pipe, a filter bucket, an air supply pipe, and an oxygen supply structure. The motor is horizontally installed on the upper end of the base, and the blower is fixed on the upper end of the base. The air inlet pipe is installed on the left end of the blower, the filter barrel is installed vertically on the front end of the blower, the air supply pipe is fixed on the upper right side of the filter barrel, and the oxygen supply structure is installed horizontally on the right end of the air supply pipe. structure, the connecting pipe is fixed on the left side of the annular pipe, and the present invention sets an output structure on the upper end of the annular pipe to make it spread out horizontally, reducing the contact probability with fish feces, thereby ensuring the clarity of the water quality; in the movable structure The lower end is equipped with a limit structure to send out oxygen intermittently, making it less likely to contact the sinking feces, thereby preventing the feces from being washed away, ensuring the inventory of water quality, and better breeding of fish.