To explore the repair process of DNA-protein crosslinks(DPC)induced by formaldehyde,this study used KCl-SDS assay to access the content of DPC in HepG2 cell line and the livers of purebred Kunming mice after exposure to formaldehyde at times of 0h,6h, 12h, 18h and 24h. The results showed that DPC,which was induced significantly by liquid formaldehyde at 75μmol·L^-1,could be removed significantly after 18 and 24 hours (p 〈 0.01 ),but not the case after 6 and 12 hours. DPC induced by gaseous formaldehyde at 3.0mg·m^-3 could be mostly remo...