The invention relates to a pile-pulling auxiliary jetting device used for a self-lifting type drilling platform. The pile-pulling auxiliary jetting device is characterized by comprising a left jetting semi-ring and a right jetting semi-ring, wherein one end of the left jetting semi-ring is connected with one end of the right jetting semi-ring through a pin; each of the left jetting semi-ring and the right jetting semi-ring comprises an upper ring plate in the form of a semi-ring sheet structure and a lower ring plate which is arranged below the upper ring plate in parallel and is same with the upper ring plate in shape and size; a strip-shaped arc-shaped plate is arranged between each upper ring plate and each lower ring plate; the upper side and the lower side of each arc-shaped plate are in fastening connection with the inner edge of each upper ring plate and the inner edge of each lower ring plate separately; a plurality of through holes are uniformly formed in the peripheral direction in each lower ring plate; a hard tube is fixedly arranged in the peripheral direction of each arc-shaped plate; a plurality of spray nozzles with downward spray holes are fixedly connected on each hard tube; the spray hole of each spray nozzle is opposite to one through hole; and a gap is formed between the spray hole of each spray nozzle and each lower ring plate.