Carbide slag is an industrial solid waste produced in polyvinyl chloride(PVC)production by calcium carbideprocess.The resource utilization of carbide slag has attracted much attention for solving the problem with carbide slagdisposal in the PVC productionindustry.However，some poisonous and harmful elements will transfer into carbide slag in the PVC production by calcium carbideprocess，resulting in the enrichment of several hazardous pollutants in carbide slag(mainlyCd，Ni，Cl -andcyanide).Research results indicate that the enrichment of pollutants can result in high levels ofpollutant elements(especiallyCd，Ni and Cl -)in some carbide slags inChina，even far beyond the limits of EnvironmentalQuality Standards for Soils，and the limits of Environmental Quality Standards for Ground Water.In order to ensure soilhealth，food safety，and environmental quality，it is suggested that those industrial solid wastes such as calcium carbide slag without any harmless treatment of pollutants should not be allowed to use as for soil remediation or conditioning directly intothe farmlands by solid waste disposalmethods，to prevent pollutants from entering food chain and harming to human health.