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Introduction:An atomic accident occurred at Fukushima 1st nuclear power plant by the eastern Japan great earthquake which occurred on March 11,2011.Radioactive isotopes in ground by 137Cs and a river spread mainly in the area of Fukushima or the neighborhood with this.Such as isotopes by radioactive materials occurred,the environment radiation dose of Japan changed big,and many people came to fear radiation exposure.It has passed for approximately 4 years from an accident,even now,there are a lot of unsolved problems.The diluted josome plant in which much stores polluted soil up separately as the current state,for planting it,it's performed.Purpose:The purpose of this research does the dying except for polluted soil to inspect the effect of the fulvo acid.Methods:Marketed ground makes them pollute by 137Cs solution.The ground which made pollute mixed fulvo acid and measured in 1,2,3 days later and 1,2,3 weeks later.When having added water for comparison,it was put into effect.The strength of the fulvo acid was performed by 3,10,20%aqueous solution.The melting point of 137Cs is 28.44 ℃.The temperature of the dryer in the 50 ℃ setting,as well as contaminated soil has been decontaminated.Decontamination of soil,were compared whether there is a change and when measured at room temperature.Discussion:More addition of fulvic acid,it was confirmed that it is significantly lower than that of water was added.Conclusions:Effect of fulvic acid has been demonstrated.Plus the fulvic acid,can be used as it is.If you take full advantage of this,perhaps the concept of decontamination changes.