The invention provides a full-automatic high concentration sodium hypochlorite generating system, comprising a water purifying unit, a salt dissolving unit, an electrolytic unit, an acid pickling unit, an alkali dissolving unit, a cooling unit, an absorption unit and a feeding unit, wherein the water purifying unit is connected with the salt dissolving unit, the electrolytic unit, the acid pickling unit and the alkali dissolving unit; the electrolytic unit is connected with the salt dissolving unit, the acid pickling unit, the alkali dissolving unit, the cooling unit and the absorption unit; the absorption unit is connected with the cooling unit; the water purifying unit, the salt dissolving unit, the electrolytic unit, the acid pickling unit, the alkali dissolving unit, the cooling unit,the absorption unit and the feeding unit are controlled by means of a programmable logic controller (PLC) unit so as to automatically execute actions of water replenishing, salt dissolving, washing, acid pickling, circulating, electrolyzing and discharging. The full-automatic high concentration sodium hypochlorite generating system can realize full automatic production of a sodium hypochlorite solution under the control of a PLC.