The invention relates to an anticorrosive sealant for hems in automobile manufacturing, particularly an anticorrosive sealants for hems of car doors, boot lids, hood shields and the like in the automobile manufacturing process, which has the functions of sealing, corrosion resistance and rust prevention. The anticorrosive sealant is a composition composed of an epoxy resin, a thermoplastic resin, synthetic rubber, a plasticizer, a latent curing agent, a vulcanizing agent, an accelerator, a preservative, a thixotropic agent and a filler. The sealant has the advantages of simple preparation technique, identical curing temperature and automobile production pipeline temperature, high storage stability, high toughness of the curing product, low cost and environmental protection. When being used for sealing, rust prevention and corrosion resistance of hems of car doors, boot lids, hood shields and the like, the sealant can greatly enhance the overall reliability and durability of the automobile. When in use, the sealant can be directly coated on the edge in need of sealing by an automatic coater or pressure spray gun, has the advantages of higher peel strength and lower internal stress, and is convenient to use.