To provide a waste treatment method which does not require securing any special transit place of waste charging the waste to an electric furnace for steel-making on the same route as iron scraps which are a main raw material, and at the same time, makes minor carriage and charging handling to the electric furnace for steel easy to improve a production efficiency.

In the waste treatment method of charging and treating the waste such as waste plastics to the electric furnace for steel-making, the circumference of the waste is pressed so as to be surrounded with the iron scraps to integrate the waste and the iron scraps by volume reduction, and at the same time, the waste integrated with the iron scraps is charged to the electric furnace for steel-making.