The invention provides a metal solid waste treatment system. The system comprises an ozone generation unit, an aeration unit, a stirring unit and a precipitation unit, wherein the ozone generation unit communicates with the aeration unit through one pipeline; the aeration unit extends into the stirring unit; and the stirring unit communicates with the precipitation unit through one pipeline. The invention further provides a using method of the metal solid waste treatment system. According to the metal solid waste treatment system, the ozone generation unit is adopted, thus the generated ozone is high in concentration and free of pollution, electrode consumption is low, the influence of environment temperature and humidity is avoided, the maintenance cost is low, metal solid waste after ozone oxidation is rapidly precipitated and separated under the action of a flocculating agent, and the waste is changed into wealth.