Abstract: In Japan, environmental problems have been a big social issue such as ground contamination due to heavy metal and water pollution due to hexavalent chromium. This study is related to a soil solidifying agent of soft ground to be made by mixing and homogenizing 800~1000°C furnace at a paper mill sludge material 40~60 wt.% calcined at slag fine powder, 20 wt.%, mixed homogenized quicklime 10~32 wt.%, anhydrite 3~10 wt.% as a raw material. There is a big advantage in the most used raw material waste as an environmental dimensions or production stage mask. Also, recording of the plant is available because there are no substances causing pollution in the modified soil functions and soil is close to neutral and a solidification time is faster and improved processing can be easily and widely applicable to shorten the air on a large scale without limitation to the type of soil.